The Strasbourg massacre occurred on February 14, 1349, when several hundred Jews were publicly burnt to death, and the rest of them expelled from the city as part of the Black Death persecutions. It was one of the first and worst pogroms in pre-modern history.
Starting in the spring of 1348, pogroms against Jews had occurred in European cities, starting in Toulon. By November of that year they spread via Savoy to German-speaking territories. In January 1349, burnings of Jews took place in Basel and Freiburg, and on 14 February the Jewish community in Strasbourg was destroyed.
This event was heavily linked to a revolt by the guilds five days previous, the consequences of which were, the displacement of the master tradesmen, a reduction of the power of the patrician bourgeoisie, who had until then been ruling almost exclusively, and an increase in the power of the groups that were involved in the revolt. The aristocratic families of Zorn and Müllenheim, which had been displaced from the council and their offices in 1332, recovered most of their power, the guilds, which until then had no means of political participation, could occupy the most important position in the city, that of the Ammanmeister. The revolt had occurred because a large part of the population on the one hand believed the power of the master tradesmen was too great, particularly that of the then-Ammanmeister Peter Swarber, and on the other hand, there was a desire to put an end to the policy of protecting Jews under Peter Swarber.
The causes of the increased anti-semitism are easy to make out. Its development found fertile territory in the religious and social resentments against Jews that had grown deeper over the centuries (with allegations such as host desecration, blood libel, deicide, and Jewish conspiracies for world domination).
Through their role as money-lenders, one of the only roles available to Jews, who were forbidden by local and often canon law, to own land or to be farmers, the Jews took an important position in the city's economy. However, this brought serious problems. The chroniclers report that the Jews were criticised for their business practices: they were said to be so arrogant that they were unwilling to grant anyone else precedence, and those who dealt with them, could hardly come to an agreement with them. This supposed ruthlessness of the Jews did not, however, derive from any particular hard-heartedness, but was rather due to the huge levies and taxes that they were made to pay, mostly in exchange for protection. Formally, the Jews still belonged to the King's chamber, but he had long since ceded these rights to the city (the confirmation of the relevant rights of the city by Charles IV occurred in 1347). Strasbourg therefore took in the most part of the Jews' taxes, but in exchange had to take over their protection (the exact amount of the taxes was determined by written agreements). In order to satisfy the city's demands, the Jews therefore had to do business accordingly, but in doing so further increased the population's, and certainly the debtors', anti-Semitism.