In the late spring of 1096, in the cities of the German Rhineland, a series of pilgrim armies that had set out for Jerusalem in response to Pope Urban II’s preaching at Clermont the previous November paused on their way through central Europe and turned their weapons on the Jewish communities of the cities they passed through. The pattern was repeated, with local variations, in Speyer, Worms, Mainz, Trier, Cologne, Metz, and Regensburg between April and July 1096. The combined Jewish dead was approximately five thousand. Most of the killing happened in three weeks between mid-May and early June. It was, until the late thirteenth century, the largest single mass-killing of Jews in Christian Europe. It was the founding event of the medieval Ashkenazi memory of Christian violence — the event that Hebrew chroniclers writing forty years later would call gezeirot tatnu, the Edicts of 1096, in the same tone of communal trauma that later Jewish writers would use for the Black Death pogroms of 1349 and ultimately for the Holocaust.
The structural pattern that the 1096 massacres established would be repeated, almost identically, by other pilgrim and revolutionary movements in the German Rhineland for the next eight centuries. The 1349 Black Death pogroms — Basel, Strasbourg, Cologne — used the same geographical pattern, the same triggers, often the same parishes. The structural template was that of 1096.
What had happened in 1096 to make the pattern available?
Urban II at Clermont
Pope Urban II preached the First Crusade at the Council of Clermont on 27 November 1095. The speech itself does not survive in the form Urban actually delivered it — what survives is four different reconstructions written down by chroniclers years later, each emphasizing different elements. The four reconstructions agree on the basic call: Christian knights of Europe should travel to the eastern Mediterranean to retake the holy places, particularly Jerusalem, from Muslim control. Urban offered an indulgence — remission of penance for sins — to those who took up the cross.
The speech was directed at the trained Christian military aristocracy of western Europe. The intended audience was the professional knights and minor nobility of France and the Holy Roman Empire who had the skills, the equipment, and the time to undertake a multi-year armed pilgrimage. The indulgence and the religious motivation were the framing; the practical objective was a professional military expedition.
What actually happened over the following six months was substantially broader and less professional than Urban had intended. The preaching of the crusade, conducted across western Europe by Urban’s deputies and by independent itinerant preachers (most famously Peter the Hermit), reached a much larger population than the aristocracy. Tens of thousands of peasants, townspeople, runaways, criminals, debtors, and unemployed laborers across France and Germany joined the crusading movement in the early months of 1096. They had no equipment, no military training, no organized command structure, and no realistic plan for the journey to Jerusalem.
These were the people who would constitute the “People’s Crusade” — the unofficial mass movement that preceded the official aristocratic First Crusade by several months. Several distinct contingents of the People’s Crusade set off from western Europe between March and June 1096, generally moving east along the Rhine valley toward the imperial heartland and then southeast toward Constantinople. The People’s Crusade, by every contemporary account, was substantially less disciplined than the formal aristocratic crusade that would follow. It was also the part of the movement that conducted the Rhineland massacres.
Why the Rhineland Jews
The Rhineland in 1096 contained some of the most established and prosperous Jewish communities in northern Europe. The communities of Mainz, Worms, Speyer, and Cologne had been founded under imperial protection in the late tenth and early eleventh centuries, when the Salian emperors had specifically recruited Jewish merchants and financiers to populate the trading cities of the empire. The Jewish communities had imperial charters that guaranteed religious freedom, property rights, and protection from local violence. They paid substantial taxes to the empire in return.
By 1096 the communities had been in place for two to four generations. They were economically well integrated into the urban economies of the Rhineland. The Mainz community alone had approximately twelve hundred members; the Worms community approximately eight hundred; the Cologne community several hundred. The communities had their own schools, their own bath houses, their own communal organizations. They had been operating peacefully alongside their Christian neighbors for nearly a century.
The crusading movement reframed them. In the rhetorical universe of the crusade — recovering the holy places from “the infidels” — the local Jewish communities became, for some preachers and many pilgrims, a more accessible category of infidel than the distant Muslims of Palestine. The argument, articulated by some of the more radical crusading preachers, was that there was no logical reason to travel two thousand kilometers to fight the enemies of Christ when the enemies of Christ were already living down the street. Why allow the Jews of Mainz to continue, the argument went, while killing Muslims in Antioch?
The argument was theologically illegitimate by the standards of the contemporary Catholic Church. Pope Urban II had explicitly excluded the Jewish communities from the crusade’s target list. The local bishops of the Rhineland — Bishop John of Speyer, Bishop Ruthard of Mainz, Archbishop Hermann III of Cologne, Bishop Egilbert of Trier — had all issued specific orders forbidding violence against the Jewish communities in their jurisdictions. The episcopal orders were grounded in both theological doctrine (the Augustinian position that the Jews must be preserved as witnesses to scripture) and immediate political concern (the Jewish communities paid substantial taxes to the bishops as their feudal lords).
The episcopal orders were not enforced. The local Christian populations in the affected cities were either indifferent to the violence or — in several documented cases, particularly Worms and Mainz — actively participated in the killing. The crusading armies that arrived in the Rhineland in the spring and summer of 1096 found ready local collaborators.
Speyer, Worms, Mainz, Cologne
The first attack occurred at Speyer in early May 1096. Bishop John of Speyer, alerted in advance, was able to evacuate most of the local Jewish community to the bishop’s own castle and to surrounding fortified residences. Of the approximately two hundred Jews of Speyer, eleven were killed by a crusading mob; the rest survived. Bishop John subsequently arrested several of the killers and had their hands cut off — the conventional medieval punishment for assault on a protected community. The Speyer episode was, by the standards of what followed, contained.
The next attack was at Worms, on 18 May 1096. The army involved — perhaps a thousand crusaders led by a French knight named William the Carpenter — broke into the Jewish quarter when the bishop’s protective evacuation efforts proved inadequate. The killing lasted approximately three days. Approximately eight hundred Jews of Worms were killed. Many died after attempting to take refuge in the bishop’s residence, which the mob breached on the second day. The surviving Jewish community of Worms was approximately fifty people. The community would not regain its pre-1096 numbers for another forty years.
The Mainz attack came on 27 May 1096. The crusading army involved was led by Count Emicho of Leiningen, a German aristocrat from the Palatinate whose participation in the crusade had been driven, by every available account, primarily by personal financial difficulties and a substantial set of grievances against the local Jewish creditors who had funded much of his earlier military career. Emicho’s army of approximately ten thousand, by far the largest of the Rhineland crusading contingents, breached the walls of the archbishop’s palace at Mainz where the city’s Jewish community had taken refuge. The killing lasted approximately one day. Approximately eleven hundred of the Mainz Jewish community of twelve hundred were killed. Archbishop Ruthard escaped through a back gate.
The Mainz massacre is the best-documented of the 1096 events because it produced the most detailed Hebrew chronicles. The accounts of Solomon bar Simson and Eliezer bar Nathan, written down approximately forty years later in nearby communities, describe the events in granular detail: the names of specific Jewish families, the speeches given by community leaders in the final hours, the specific theological frame in which the community had chosen to die rather than convert. The chronicles describe several specific cases of kiddush ha-shem — the sanctification of God’s name through martyrdom — in which Jewish parents killed their own children rather than allow them to be forcibly baptized into Christianity. These are among the most disturbing passages in medieval Hebrew literature. They are also the basis for the subsequent Ashkenazi theological understanding of religious martyrdom under Christian violence.
The Cologne attack came in early June. Archbishop Hermann III had, in the days before, hidden the Cologne Jewish community in his own country estate at Wolkenburg outside the city walls. The protection was largely effective. The community survived, although approximately fifty were killed in the city before the evacuation was complete. Cologne is the only major Rhineland community that came through 1096 substantially intact. It would be the same community, two hundred and fifty years later, that would be destroyed in the 1349 Black Death pogrom — the structural pattern repeating with different perpetrators.
Trier, Metz, and Regensburg followed in late June and early July. The numbers in each were smaller — the Trier community was approximately two hundred, the Metz community approximately one hundred — but the proportions killed were comparable. By mid-July 1096 the Rhineland massacres had largely run their course. Count Emicho’s army left the empire moving south along the Danube toward Hungary, where it would be largely destroyed in a series of military engagements with King Coloman of Hungary before reaching the actual crusading theater of operations.
What the Jewish communities did with the memory
The 1096 events produced the founding documents of medieval Ashkenazi historical writing. The Hebrew chronicles of Solomon bar Simson and Eliezer bar Nathan, written approximately forty years after the events, are the earliest substantial works of historical prose in the post-Talmudic Jewish tradition. They were intentionally constructed as theological accounts — not as neutral historical reporting but as records of kiddush ha-shem designed to be read in Jewish communities on Tisha B’Av (the annual day of communal mourning) and to be preserved as evidence of communal endurance under persecution.
The chronicles were copied and recopied across the medieval Ashkenazi world. Manuscripts survive in libraries from Oxford to Jerusalem. The reading of the 1096 chronicles became a standard component of medieval and early modern Jewish religious observance in the Rhineland, the Czech lands, Poland, and eventually the broader Ashkenazi diaspora. The memory of 1096 was, in this sense, kept alive within the affected communities continuously for nearly a thousand years.
The general European Christian population did not preserve the memory in any comparable form. The 1096 massacres are mentioned in the Latin chronicles of the First Crusade — Albert of Aix, Guibert of Nogent, Ekkehard of Aura — but only in passing, and generally without the kind of detail that the Hebrew sources contain. The Catholic Church’s official position on the 1096 events, articulated by subsequent papal bulls (most notably Sicut Judaeis of Pope Calixtus II in 1120 and Constitutio pro Judaeis of Pope Gregory IX in 1235), was that the killing of Jewish communities was a sin and should not be repeated. The position was repeated in different forms by every subsequent medieval pope, including Clement VI during the Black Death of 1349. The position was not, generally, enforced on the ground.
What survives physically of the 1096 communities is sparse. The Speyer Jewish quarter, which was preserved relatively intact, still contains the twelfth-century mikvah (ritual bath) that had been used by the pre-1096 community and was reused by the rebuilt community in the early twelfth century. The bath is now a small archaeological site under the streets of modern Speyer’s Judengasse. The Worms synagogue, built in 1034 by the pre-1096 community, was destroyed in the 1096 attack, rebuilt, destroyed again in 1349, rebuilt, destroyed by Kristallnacht in 1938, rebuilt by the post-war German government in 1961. It is still in use as a synagogue. The current building incorporates stones from each of the previous reconstructions.
The Cologne Jewish quarter, having survived 1096 substantially intact, was the site of the 12th-century mikvah that survived the 1349 massacre and that is now a small archaeological site under the Rathausplatz. The bath has been in use, in one form or another, by Jewish communities in Cologne for nine hundred years. The water in the bottom of the chamber, drawn from a natural spring under the medieval streets, has flowed continuously through every event the city has been through. The spring is still flowing.