In the wake of a narrow military defeat over Muslim forces, Leo III of Constantinople decided his nation's weakness lay in its heterogenious population, and began the forcible conversion of the Jews, as well as the "New Christians." Most converted under Leo III clandestinely continued their Jewish practices.
In the town of Blois, southwest of Paris, Jews are falsely accused of committing ritual murder ((killing of a Christian child) and blood libel. The Church's Fourth Lateran Council decrees that Jews be differentiated from others by their type of clothing to avoid intercourse between Jews and Christians.
The Bull was withdrawn the following year, alleging that the Jews of Rome attained the Bull by fraud.
After a priest was hit with some sand from a few small Jewish boys playing in the street, he insisted that the Jewish community was plotting against him and began a virulent campaign against the city's Jews, resulting in the massacre of thousands and the destruction of the city's synagogue and Jewish cemetery.
King Wenceslaus refused to condemn the act, insisting that the responsibility lay with the Jews for going outside during the Holy Week.
The Great Synagogue and the Great Library in Alexandria are destroyed as well as the entire Jeiwsh community of Cyprus. Hadrian renames Jerusalem Aelia Capatolina and builds a Pagan temple over the the site of the Second Temple. Judea (the southern portion of what is now called the West Bank) was renamed Palaestina in an attempt to minimize Jewish identification with the land of Israel.
Roman emperor Lucious Septimus Severus treats Jews relatively well, allowing them to participate in public offices and be exempt from formalities contrary to Judaism.