Winterthur_massacre
The Kyburg massacre was an anti-Semitic episode in Kyburg near Winterthur, present-day Switzerland, which occurred in 1349. The Jews sought refuge in the castle of Kyburg from the surrounding cities of Winterthur and Diessenhofen, as well as from all towns under the hegemony of the Duke of Austria. They had probably started to gather there in November 1348, when the first Black Death persecutions started. Probably pressured by the other Imperial cities, Albert II, Duke of Austria eventually ordered the Jews to be put to death by burning.
On 18 September 1349, 330 Jews were burned in the fortress. The Kyburg massacre was one of the deadliest massacres of Jews in Swiss areas.[2]