Poisoned Wells: Accusations, Persecution, and Minorities in Medieval Europe, 1321-1422
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Between 1348 and 1350, Jews throughout Europe were accused of having caused the spread of the Black Death by poisoning the wells from which the entire population drank. Hundreds if not thousands were executed from Aragon and southern France into the eastern regions of the German-speaking lands. But if the well-poisoning accusations against the Jews during these plague years are the most frequently cited of such cases, they were not unique. The first major wave of accusations came in France and Aragon in 1321, and it was lepers, not Jews, who were the initial targets. Local authorities, and especially municipal councils, promoted these charges so as to be able to seize the property of the leprosaria, Tzafrir Barzilay contends. The allegations eventually expanded to describe an international conspiracy organized by Muslims, and only then, after months of persecution of the lepers, did some nobles of central France implicate the Jews, convincing the king to expel them from the realm.
In Poisoned Wells Barzilay explores the origins of these charges of well poisoning, asks how the fear took root and moved across Europe, which groups it targeted, why it held in certain areas and not others, and why it waned in the fifteenth century. He argues that many of the social, political, and environmental factors that fed the rise of the mass poisoning accusations had already appeared during the thirteenth century, a period of increased urbanization, of criminal poisoning charges, and of the proliferation of medical texts on toxins. In studying the narratives that were presented to convince officials that certain groups committed well poisoning and the legal and bureaucratic mechanisms that moved rumors into officially accepted and prosecutable crimes, Barzilay has written a crucial chapter in the long history of the persecution of European minorities.
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Poisoned Wells - Tzafrir Barzilay
THE MIDDLE AGES SERIES
Ruth Mazo Karras, Series Editor
Edward Peters, Founding Editor
A complete list of books in the series is available from the publisher.
POISONED WELLS
Accusations, Persecution, and Minorities in Medieval Europe, 1321–1422
Tzafrir Barzilay
PENN
UNIVERSITY OF PENNSYLVANIA PRESS
PHILADELPHIA
Copyright © 2022 University of Pennsylvania Press
All rights reserved. Except for brief quotations used for purposes of review or scholarly citation, none of this book may be reproduced in any form by any means without written permission from the publisher.
Published by
University of Pennsylvania Press
Philadelphia, Pennsylvania 19104-4112
www.upenn.edu/pennpress
Printed in the United States of America on acid-free paper
10 9 8 7 6 5 4 3 2 1
Library of Congress Cataloging-in-Publication Data
Names: Barzilay, Tzafrir, author.
Title: Poisoned wells : accusations, persecution, and minorities in medieval Europe, 1321–1422 / Tzafrir Barzilay.
Other titles: Middle Ages series.
Description: 1st edition. | Philadelphia : University of Pennsylvania Press, [2021] | Series: The Middle Ages series | Includes bibliographical references and index.
Identifiers: LCCN 2021028022 | ISBN 9780812253610 (hardcover)
Subjects: LCSH: Poisoning—Europe—History—To 1500. | Wells—Europe—History—To 1500. | Persecution—Europe—History—Middle Ages, 600–1500. | Minorities—Violence against—Europe—History—To 1500. | Jews—Persecutions—Europe—History—To 1500. | Black Death—Europe. | Europe—Ethnic relations—Political aspects—History—To 1500. | Europe—Ethnic relations—Social aspects—History—To 1500.
Classification: LCC D202 .B37 2021 | DDC 909.07—dc23
LC record available at https://lccn.loc.gov/2021028022
To Timna, Yotam, and Be’eri
Contents
Introduction
Chapter 1. Poison in High Medieval Society
Chapter 2. First Wave: The Lepers’ Plot
Chapter 3. New Targets: The Implication of Jews and Muslims
Chapter 4. Plague, Accusation, and Persecution in Southern Europe
Chapter 5. Crisis, Political Leverage, and the Jews
Chapter 6. Accusations Subside: After the Black Death
Conclusion
Appendix. Chronicles Discussing the Persecution of Jews During the Black Death
List of Abbreviations
Notes
Bibliography
Index
Acknowledgments
Introduction
A new fear fueled suspicions of minority groups in late medieval Europe, as the belief took hold that lepers, Jews, and others were conspiring to poison drinking wells in order to cause widespread illness and mortality. These minority groups allegedly organized this plot to eliminate the elite and subvert the social order. The response to them was persecution. This book tracks how these ideas emerged and developed over time, explains how they gained popularity, and shows how they ultimately triggered violence.
Due to its unique characteristics, the threat of well poisoning was particularly intimidating and unparalleled in medieval culture. Water, often supplied in medieval cities through a system of public wells, was essential for daily life. If water sources were poisoned, no one was safe. Furthermore, since poison is imperceptible until the victim is ill, the threat was perceived as particularly insidious. Well poisoning sparked rumor and struck fear in the hearts of late medieval Europeans. At the same time, well poisoning was distinct from other criminal poisoning charges and from the ritual murder allegations notoriously directed against Jews. Whereas standard poisoning or even ritual murder targeted a specific person, well poisoning was an attack against the public—a medieval version of modern weapons of mass destruction.
In addition to the radical threat posed by well poisoning to the public, the communal nature of water sources in medieval towns triggered another layer of allegations. As Christians shared water sources with Jews and other minorities, any minority group seeking to poison the Christian majority would have to consider that its own members would be at risk from this action. Thus, the safety of these individuals would depend on a communal conspiracy ensuring that group members knew not to drink the poisoned water. This belief, that effective well poisoning called for extensive collusion, added to the distinct character of this phenomenon.
Fears of well poisoning went beyond mere emotion and entered the sphere of action: several European minorities were persecuted for alleged well-poisoning attempts. Best known are the attacks perpetrated against Jewish communities in the German Empire (known as the Holy Roman Empire) between 1348 and 1350, when the Black Death devastated the continent and Jews were accused of intentionally spreading the disease by poisoning the water supplies. A series of terrifying massacres ensued, destroying many Jewish communities across Europe. Even earlier, in 1321, lepers in southwestern France had been accused of spreading their illness by poisoning water sources with the aid of Muslim rulers and local Jews; both Jews and lepers suffered violent reprisals, from expulsion or isolation to execution by fire. Similar, albeit more localized, cases can be traced from the early fourteenth to the early fifteenth centuries. Often Jews were the victims, but lepers, Muslims, paupers, and foreigners also suffered persecution.
Delving into this phenomenon, Poisoned Wells asks the following set of intersecting questions: What were the origins of the fear of well poisoning? How did this notion spread across Europe, and how can we account for the variation in its reception? Which minority groups were targeted in each case and why? And, finally, why did the accusations begin to peter out in the fifteenth century? To answer these questions, this book examines and contextualizes the development of the accusations as they emerged. Most important, the book focuses on the process by which rumors of well poisoning became accepted as plausible by the public and even more so by political institutions. It studies the narratives that were presented to convince leaders and officials that minority groups committed well poisoning and the legal and bureaucratic mechanisms that then solidified rumors into officially accepted crimes. The common thread of the book is the development and spread of the accusations; my main emphasis throughout is on medieval legal and formal institutions, the ways they were operationalized and the actors who used and abused them.
The book locates well-poisoning accusations within a range of local phenomena specific to the later Middle Ages, when Europe was in the throes of major environmental, demographic, and economic crises such as famine, war, and the Black Death. This broad-based contextualization helps to account for the quick diffusion of the accusations across multiple political and linguistic boundaries and their transfer from one minority to another. Moreover, the accusations often derived not from a royal ordinance or a rise in popular hatred but rather from the organized political action of local officials. By analyzing the intricate sociopolitical dynamics embedded in their decisions in light of broader contexts, the study uncovers the interlocking factors motivating royal officials, town councils, and local nobles.
Poisoned Wells is based on an analysis of diverse primary sources, including chronicles, official correspondence, financial documents, and records of interrogations in Latin, French, German, and Hebrew. These documents are located in archives throughout France, Spain, Germany, and Switzerland, and some have never been published. The analysis of such divergent source material presents methodological challenges. The book presents arguments from different historical fields: from social and cultural history, economic history, and environmental history. Some of the sections below discuss the historiography relevant for each kind of source. The major question of the study, why and how medieval people and institutions accepted, adopted, and spread well-poisoning accusations, binds together these perspectives.
Well-poisoning accusations merit close study because they provoked violent persecution against minorities, which transformed the place of those groups within Europe. The leprosaria of France never recovered from the persecution of 1321, and neither did the Jewish population in the kingdom. The persecution of Jews in the German Empire in 1348–1350 destroyed many of their communities, which had to be completely rebuilt.¹ Additionally, analysis of the accusations illuminates the process by which ideas influence social or political action. In our case, the allegations convinced officials and rulers to change course and move from defending minority groups to acting against them. Finally, this study contributes to the understanding of society and culture in the later Middle Ages, as the accusations were a phenomenon unique to this period, appearing, flourishing, and declining during a single century.
Well-poisoning accusations, then, have important scholarly implications. Nonetheless, they have never been the focus of a specialized study. This is somewhat surprising, considering that books about the Black Death tend to frame the persecution of Jews as a consequence of the plague, and studies of medieval Jewish history often refer to it. However, discussion is frequently based on secondary sources alone, and scholars sometimes consider the accusations as a natural progression of preexisting violent relationships between Christians and Jews, giving contextualization short shrift. Other historians offer sophisticated treatments of the subject but concentrate on particular episodes of persecution.² Only a handful of scholars have provided broader analyses of this phenomenon. Joshua Trachtenberg, in his Devil and the Jews (1943), dedicated a chapter to the idea of Jews as poisoners, suggesting that poisoning accusations were a part of their demonization in medieval Christian culture. This explanation is intriguing, but Trachtenberg’s interpretations should be revisited in light of more modern scholarship. Carlo Ginzburg, in Ecstasies (1989), makes an interesting, albeit somewhat speculative, attempt to connect the persecution of 1321 with that of 1348 but never offers a comprehensive account of the accusations. Other scholars have treated particular aspects of the accusations: Séraphine Guerchberg and Jon Arrizabalaga study the connections between the accusations and scientific ideas about the plague, and Françoise Bériac-Lainé explores the history of lepers in France, identifying their persecution in 1321 as a turning point. David Nirenberg also analyzes the events of 1321, stating that political motives played a major part in the development of the accusations. Franck Collard writes about well poisoning in the context of his general study of poison and poisoning charges in medieval Europe.³ These works are important sources and inspirations for this book.
Several studies have examined the persecution of Jews during the first outbreak of the Black Death. The most extensive of these is František Graus’s Pest, Geissler, Judenmorde (1987), which presents a full history of the events of 1348–1350 as part of a major European crisis. Alfred Haverkamp’s (1981) work on the political, social, and religious features of the persecution remains one of the most thoroughly researched studies of these events. More recently, Samuel Cohn has argued that the Black Death was a turning point in the persecution of Jews in late medieval Europe: before 1348, cultural and religious causes mostly drove the persecution, whereas afterward, economic and social factors took center stage. Remi Jedwab, Noel Johnson, and Mark Koyama have studied the demographic and economic background of the persecution. These studies, however, focus on the persecution of Jews, and not on well-poisoning accusations per se.⁴ Scholarship, thus, has tended to discuss well poisoning within broader contexts rather than to focus on the charges themselves, their stimulus, and their development. Building on the existing scholarship, this book offers just such a comprehensive view of the accusations as a unique historical phenomenon.
The historical analysis presented includes a chronological review of the accusations, a mapping of their geographical spread, and estimates regarding the scale of each episode. Such a list of facts
may leave the mistaken impression that this study is a positivist attempt to reconstruct the historical reality of well-poisoning accusations as they truly were.
But that is in no way my goal. Rather, it is the close scrutiny of the details that permits an analysis of the accusations as a force for social change and an account of the dynamic that generated them.
For William Sewell, a historical event
is a ramified sequence of occurrences that is recognized as notable by contemporaries, and that results in a durable transformation of structures.
He adds that in spite of the punctualist connotations of the term, historical events are never instantaneous happenings: they always have a duration, a period that elapses between the initial rupture and the subsequent structural transformation.
⁵ Thus, the taking of the Bastille in 1789, according to Sewell, was an event that both caused and symbolized the French Revolution, despite the fact that the attack itself was a limited affair, with little immediate importance. How did it happen, he asks, that this minor incident ignited a social dynamic that ultimately transformed political structures that had been in place for centuries? To answer this question, he delves into the days following the taking of the Bastille. In his view, this event came to emblematize both the need for and possibility of deep political change, and to serve as a model for the ways to achieve such change. This transpired over time, in response to a complex social dynamic that prompted people to accept this symbol and drove them to action against the existing order. In this way, Sewell argues, a historical incident was transformed into a historical event.
In his analysis, he stresses a meticulous process of following details, of mapping them, and of reviewing their chronology: Careful reconstruction of the narrative is, I submit, an intellectual necessity in any analysis of events. But it is also necessary to tack back and forth between narration and theoretical reflection.
⁶ In other words, the careful description of the facts
serves the theoretical analysis of the event, while the theoretical framework allows for organization of the information.
Sewell’s logic is highly applicable to the study at hand. Well-poisoning accusations evolved during the persecution of 1321, as details were added to them. When chroniclers reported the alleged plot later in that year, they were already presenting a developed narrative—a consensually constructed version of the event that stated that Jews and lepers conspired, supported by Muslim leaders, to poison all the wells in France. This event certainly created a structural change, leading to mass execution of lepers and Jews, while the survivors were segregated (in the case of lepers) or expelled (in the case of Jews). Understanding what made these accusations powerful enough to bring about this structural change requires that we study the process by which they were formed, identify where they started, describe their precise nature in different circumstances, and explain how and why different political agents decided to adopt them. In this effort, we will give particular attention to documents produced during the formation of the allegations. The same is true for the events of 1348–1350 and for later episodes of well-poisoning accusations. Thus, we need to know under what circumstances the allegations reappeared, how they were transferred from one minority group to another, and why contemporaries found them convincing. Ultimately, we are aiming to move from mapping and analysis to discovering the dynamic that opened the door for these accusations to spur major social shifts.
The book presents a careful reconstruction of local cases, and I do not assume that well-poisoning accusations and persecution took the same form everywhere. Indeed, we will see that the accusations unfolded in various ways under different circumstances. Thus, the book provides a response to the challenge presented by Nirenberg in his Communities of Violence (1996),⁷ where he claimed that local factors played a pivotal role in triggering violence between members of different social groups. Nirenberg stated that while the ongoing enmity between minorities and the majority may have been a factor in arousing violent incidents, personal, communal, and practical considerations were frequently of greater significance. For Nirenberg, then, such violence ought to be discussed primarily within its local context. This perspective, though, limits our ability to address interreligious conflicts as a general phenomenon, broader than particular local cases. To deal with this challenge, the book analyzes many local cases, gleaning information from each primary source, and only then offers general conclusions based on comparisons and generalization. In this manner, it reinserts local history into global processes, tracking how the accusations evolved and spread.
The historical perspective of this book calls for further explanation. As my concern is allegations against minorities, I necessarily consider the ideas, motives, and actions of the accusers and not the accused. I assume that some contemporaries had to have found these accusations convincing. While I highlight political and economic benefits that some accusers stood to gain from the persecution of minorities, the book never discusses the accusations merely as an excuse for persecution. Some authorities may have maliciously concocted false stories about minorities, but to trigger violence, these stories had to be conceivable. Whether members of the public, officials, or even the king, the people who had no direct interest in mistreating members of minority groups had to be confident that water sources had been poisoned. It is the mechanisms that generated this confidence that are the main concern of this book.
This study’s orientation supports my claim that the violence erupted due to the ideas, interests, and actions of the persecutors. Indeed, it assumes that the persecuted minorities had little influence over this process.⁸ It is relevant that the great majority of the surviving documents represent the persecutors’ point of view. It is impossible to conclude based on inquisitorial records, for example, what the suspects really thought, did, or even meant to say.⁹ These documents represent the views of those who composed them: investigators, officials, and notaries. The same is true for chronicles and official letters, which report events through the eyes of the authorities or of scholars. They rarely describe reliably the views of the victims, who were occupied with more pressing business than history writing.
This book also offers an analysis based on the premise that well-poisoning accusations were always false. While the notion of mass poisoning of wells seems unlikely, why should we presume that so many medieval contemporaries erred in this regard? The answer rests not in theoretical considerations but in historical analysis. Some chroniclers suggest that people suddenly discovered that the wells were poisoned, but careful scrutiny of the sources shows that this is unlikely. Details of the alleged plots were invented and put together over time, additional minority groups were implicated, and political coalitions supporting the charges were formed. That is, the belief that the wells were poisoned originated from political, social, and cultural processes, not from any actual discovery of infected water sources.
Hence, this book is not about medieval minorities per se, but rather about the mechanisms that European culture and society applied against them. I do not suggest that members of these minorities—Jews, lepers, Muslims, paupers, and heretics—were passive or lacked historical agency. It is likely that they tried to use their political power to sway the opinion of leaders, officials, or institutions against the accusations. However, the surviving evidence of such efforts is slim, and while the book analyzes the decision-making processes of these officials, leaders, and institutions, it can only speculate concerning what members of minority groups did to influence them. It is clearer what minorities did years after the persecution to reestablish their communities, reclaim their property and political rights, and rebuild their lives,¹⁰ but this theme is beyond the scope of this study. Thus, the following pages probe a particular set of challenges that minorities faced within medieval European society, but not necessarily the ways in which they responded to those challenges.
I use the term persecution
to indicate the implementation of organized violence against marginalized groups or individuals. The form of the violence varied; in the context of well-poisoning accusations, it often included arrests, interrogations (sometimes under torture), and organized executions of suspects. Similarly, different agents organized the violence; in our context, it was generally nobles, officials, institutions, or rulers, rather than the general public. When there is a need to clarify who was responsible for the violence, I use the terms execution,
legal violence,
or institutional violence
to suggest official organization. When members of the lower classes are described as initiating violent acts, I apply terms like mob violence,
popular violence,
or pogrom.
Other terms, such as attack,
revolt,
or simply violence
are intended to be neutral (insofar as such terms can be neutral).¹¹ Another term that requires explanation in this context is wells.
Many sources claim that the suspects poisoned springs, pools, basins, and water fountains, in addition to wells. I use well poisoning
as a shorthand for poisoning of public sources of potable water, without claiming that the accusations were exclusive to wells. Notably, as rivers and lakes were generally considered too large or having too strong a flow to be poisoned, they are not included in this definition. Personal names usually appear in this book in their vernacular form, unless it is difficult to deduce this form from the Latin sources. All translations are my own, unless otherwise specified in the notes.
The book includes six chapters, which follow the development of the accusations in a chronological order. The first chapter explores the origins of the accusations in several historical shifts of the thirteenth century: growing urbanization, a new focus on poison in medical literature and in political life, and the increasing marginalization of minorities. The second chapter probes the first documented wave of well-poisoning charges, made against lepers in France and Aragon in 1321. It shows how local officials promoted the allegations in order to deprive lepers of the political and economic privileges that the Crown had awarded them. The third chapter discusses the shift of the accusations from lepers to Jews and Muslims in 1321 and delineates the pivotal role that the nobility of central France played in this process. The fourth chapter considers the reemergence of the accusations in southern Europe during the Black Death in 1348, showing that here, too, the charges were first directed against paupers, vagabonds, and mendicants, and only later transferred to Jews. The spread of well-poisoning accusations through the German-speaking lands is the topic of Chapter 5, which further explains that the accusations thrived in these lands due to the political instability that characterized many cities. The final chapter depicts the decline of accusations in the following century and shows that while there were still occasional well-poisoning allegations, they never again developed into large-scale persecutions.
This book, then, seeks to understand how culture impelled medieval people to action—to political protest, religious devotion, and, sometimes, horrifying violence—by presenting the history of well-poisoning accusations through the eyes of administrators, burghers, and the public. A close look at the social and political mechanisms behind these accusations will reveal that they were created to drive and justify major social transformations, in particular the persecution and marginalization of minorities. Yet, the accusations could only have achieved these goals if contemporaries considered them authentic. In the following chapters, we will see how the intricately interwoven social, cultural, economic, and environmental forces at play made the accusation of well poisoning a particularly appealing notion to endorse.
Chapter 1
Poison in High Medieval Society
Gavin Langmuir claimed that it would be hard to find a clearer example of irrational scapegoating
than well-poisoning accusations against Jews.¹ From the perspective of a contemporary historian, he is surely right: these ideas are so foreign to our understanding and distant from our social conventions that it seems they could hardly be explained rationally. Yet, it is not hard to understand why mass poisoning would seem reasonable to people who witnessed the unprecedented mortality of the Black Death or the Great Famine of 1315–1317. In examining the development of well-poisoning accusations, then, it is necessary to understand their historical context first.
This chapter aims to portray a society in which well poisoning was considered a realistic possibility. Notably, it does not try to establish direct causality between social phenomena and the development of well-poisoning accusations. We can imagine, for instance, that fear of contamination of urban water sources could have contributed to the development of these claims. However, as we will see, while such fears were widespread in many late medieval towns, not all of these places produced poisoning accusations. While water contamination could facilitate the emergence of such accusations, it was not enough to cause them. This chapter reviews this and other possible contributing factors, rather than the direct causes for particular episodes of persecution.
The first well-documented cases of such accusations appeared in France in 1321, although some scholars have claimed that Jews, and perhaps other minorities, had been charged with well poisoning before that date. I have shown elsewhere that this claim is unlikely to be true, as almost all of the sources that mention such early cases were written after the Black Death, thus probably retrojecting the reality of the fourteenth century onto earlier periods. As far as contemporary sources reveal, such accusations first surfaced in the later Middle Ages, not in earlier periods.²
There is only a single credible case of accusations against Jews before 1321. According to two documents of the town court of Manosque, Provence, local Jews were accused of well poisoning there in 1306.³ The first document states that around 13 September, someone reported to the court that several Jews had tried to throw the body of an infant into a well. The Jews were suspected of having killed the infant, though the court was not convinced that this was true.⁴ Allegedly, the Jews carried the body in a basket or coffin, walked toward a well near the northern gate of the town, and threw the body in. According to the report, they did this in order to infect the water, so that anyone who drank from the well would become sick and die. The court of Manosque opened an investigation into the charges.
Our second document records the questioning of a suspect in these acts, a Jew named Mosse de Mana from nearby Forcalquier. Local officials were quick to act, and Mosse was questioned by the court of Manosque on the very day the investigation was launched. After he swore to tell the truth, Mosse presented his version of the events. On the morning in question, he had received a body of an infant from the son of a Jew called Isaac de Digna, a resident of Forcalquier. Isaac had given Mosse the body because there was no Jewish cemetery in Forcalquier, and he wanted Mosse to bury it in the cemetery of Manosque. While Mosse indeed carried the body to Manosque in a coffin or a basket, when he arrived there he met a Jewish physician, Master Isaac (not to be confused with the son of Isaac de Digna, who gave Mosse the body). The physician told Mosse that he was not permitted to bring a dead body into the town. Thus, Mosse turned back toward the gate, but stopped on his way to drink from the well. He put down the basket near the well, covered it with his hood, and proceeded to drink. Mosse insisted that he never tried to throw the body into the well, and that no other Jews were present. Probably hoping to establish a witness to his innocence, he also mentioned that a certain old man saw him sitting near the well with the basket and drinking. Mosse further argued that the remains were the body of a Jewish boy, presumably to allay any suspicion that the boy was a victim of ritual murder. Here, Mosse concluded his testimony; the outcome of the case is lost to history.⁵
In this, the only clearly documented case of well-poisoning accusations against Jews in medieval Europe before 1321, the documents present a reasonable explanation for the development of the accusation: it was a simple misunderstanding.⁶ If any other cases came up, it is likely that, like Mosse’s story, they involved one or a few isolated individuals who did something to raise public suspicion. Even if an investigation followed and the suspects were convicted, there is no reason to think that whole Jewish communities would have been punished. As for non-Jews, we will see that some chroniclers implied that Muslim leaders plotted to poison Christians before the fourteenth century, but until 1321 these stories never led to actual persecution.
Possible Factors for the Development of the Idea of Well Poisoning
The Manosque affair, though a single incident, says volumes about the attitudes of medieval townspeople toward their public water sources. Contamination of the water supply, by mishap or by malice, was a real threat in medieval towns. To understand why this was so, we need to consider the mechanisms of urban water supply, their maintenance, and the dangers of using them. The European population grew continuously during the High Middle Ages, reaching its peak around 1290. Cities became dominant centers of trade and industry, while lands in the countryside became more expensive and less productive. Consequently, many moved to the towns, which became larger and more crowded.⁷ As medieval cities became centers of innovation and power, administrators were forced to regulate the use of common resources, water in particular. Smaller towns could allow individuals to use common resources freely, but, as the population grew, these resources became scarce and towns had to control access to them.⁸ Municipal water sources were particularly problematic. All inhabitants required water for drinking, for themselves and their livestock, and for cooking, laundry, and irrigation. In addition, industries such as butchering, tanning, dyeing, and linen-making required large amounts of water. Thus, the urbanization of the High Middle Ages significantly increased pressure on water supply.⁹
Urban leaders considered themselves responsible for supplying fresh water to their citizens at the same time as the growth of cities made private wells and local fountains increasingly inadequate sources for this basic need. Infrastructure was called for that would permit maximal use of local water sources and bring an influx of additional water from sources outside of the city. Medieval towns thus dug new public wells, built cisterns to gather water from rooftops, and planned aqueducts and pipes to bring water from external sources. These complex building operations were made possible by the technological advances made by craftsmen in this period. Towns that had rivers flowing through them could postpone the adoption of public water systems, but the larger these towns became, the more urgently they needed such a system. By the fourteenth century, most inhabitants of western European cities relied on public water systems rather than private water sources.¹⁰
Keeping water clean and available was often an uphill battle, as urban water sources were in constant danger of pollution. Despite attempts to develop an efficient sewage system, human and animal waste sometimes flowed into the drinking water. Only a handful of cities could afford the expensive and complicated construction of an enclosed sewage system, and the disposal of human waste was usually based on the use of cesspits rather than flushed drains. Bad weather or local system malfunctions heightened the risk that potable water would become polluted, a major cause of concern for urban officials.¹¹ In 1314, Alice Wade of London was summoned to the mayor because she used a wooden pipe to connect her indoor latrine to a public gutter. This badly built apparatus clogged the public drain, and the neighbors complained. Wade was forced to remove the pipe, but others who used similar waste-disposal methods were never caught. People charged with acts that could pollute public water sources were punished with significant fines or even imprisonment.¹² These cases were far from rare. In London, authorities received over one hundred complaints related to issues of water supply, drainage, sewage, and flooding in the first half of the fourteenth century alone.¹³ Water sources could be polluted not only by sewage, but also by laundry or by animals that drank from the water. Generally speaking, livestock and laundering were prohibited near water sources designated for drinking and were instead limited to the river or to dedicated basins. Nonetheless, not everyone respected the law.¹⁴
Poisonous materials used for tanning and dyeing, as well as blood and waste from slaughterhouses or fish-cleaning workshops, could end up in the water system. The manufacture of linen and rope required the immersion of flax in water, and often the plant material rotted in the standing pools and caused a stench.¹⁵ Interestingly, medieval people knew how to use water poisoning to their advantage, applying piscicides based on poisonous herbs or quicklime in ponds to stun fish and make them easy to catch. This common technique was safe when used in isolated water sources in the countryside, but not in towns. Thus, Pistoia banned the practice in the late thirteenth century, and Florence followed in 1322. Considering the popularity of this method, it seems that urban legislators were concerned not with the quality of the fish caught but with the danger of water poisoning.¹⁶
Indeed, while urban authorities invested significant resources in developing new water sources and sewage systems, their most effective tool for maintaining fresh water supplies remained regulation. Some Italian cities issued legislation to protect the water supply as early as the twelfth century, but during the thirteenth and fourteenth centuries such laws became common throughout Europe.¹⁷ These laws limited waste disposal and regulated the use of water sources; hence, butchers were not allowed to dispose of blood, animal carcasses, or intestines near sources of drinking water, and polluting workshops were moved downriver. In Siena, wool dyers were expected to dig covered drains to dispose of contaminated water; in Narbonne, certain places and times were designated for disposal of polluted water. Some water basins were dedicated for industrial use, and others for everyday public use. To uphold these regulations, towns employed officials responsible for maintaining the water system. Siena dedicated a full chapter of its communal statutes to regulating infrastructure, water in particular. An urban official, the giudice sindaco, regularly inspected the use of wells and reported violations to his superiors. Similar positions were established in London in 1310 and Freiburg in 1333. In addition to enforcing regulations, these officials initiated efforts to clean and repair the water systems, and others developed new infrastructure projects.¹⁸
Medieval townsmen were aware of the connection between urban pollution and infectious diseases, which were indeed more common in the city. Such pollution could supposedly corrupt the air or the water and cause major mortality, an idea that justified an array of antipollution regulations. Doctors claimed that pollution could cause outbreaks of the plague and suggested methods to eliminate the danger. Yet, the fear of pollution existed long before the Black Death, and urban administrators left records complaining about the low quality of water and noxious smells. Some protested that municipal wells were contaminated by pollution or poor upkeep and posed a danger to the public.¹⁹ Avoiding water altogether was impossible, and medieval people drank water regularly. It was important to know which water sources to choose. Water from closed sources like wells or springs was often preferred over water from reservoirs or rivers, and foreigners were more likely to drink from contaminated basins or wells.²⁰ Not all wells were clearly marked or fenced, and sometimes children or animals fell inside, especially in the countryside, where wells were not as well constructed as in the city. Still, as the case of Manosque shows, some feared that bodies might end up in public wells, even within the city. On rare occasions, a person drowned in a public water basin; in such cases, it is likely that the body was quickly removed. In general, townsmen were rightly concerned about drinking from public sources, which were often polluted, but they usually had little choice.²¹
Environmental historians have suggested a connection between the medieval fear of water pollution and the appearance of well-poisoning accusations.²² Indeed, there is a chronological correlation between these two phenomena: the shift from private to public water infrastructure, which brought with it the fear of pollution, took place largely during the late thirteenth century, while the first wave of the accusations happened in 1321. Thus, the suggested cause preceded the effect by several decades. Moreover, as contaminated wells were a reality of medieval towns, their inhabitants knew that water sources were polluted regularly, despite the best efforts of the authorities, and could cause widespread disease. From the perspective of medieval townsmen, then, there was nothing fantastic or irrational about the accusations. As wells were occasionally polluted by mistake, it seemed reasonable that they could also be poisoned deliberately. However, even if the medieval environmental circumstances made well poisoning imaginable, they did not directly cause well-poisoning accusations to appear, and it is difficult to show a correlation between urban water pollution or regulations and well-poisoning accusations. The first wave of the accusations started in southwestern France, hardly the most urbanized or polluted area of the continent, while some highly urbanized areas, such as the cities of northern Italy, never experienced such accusations. Moreover, while in some cases a major plague preceded the accusations, in others there is no evidence that this happened; the lepers of France and Aragon were accused of well poisoning independent of any epidemiological crisis. Fear of water pollution, then, may have been a contributing factor to the development of the accusations, but probably not a principal one.
Criminal attempts to poison particular individuals may be a further contributing factor to the emergence of well-poisoning accusations. Collard, who documented more than four hundred cases of medieval criminal poisoning, has demonstrated that the late thirteenth century saw a significant increase in the frequency of such instances. This estimate, says Collard, is tentative for several reasons. First, such cases were conflated with