The Bull was withdrawn the following year, alleging that the Jews of Rome attained the Bull by fraud.
Jews in Norwich, England, are accused of murdering a Christian child in what is believed to be the first ritual murder charge.
Some Jews return within a few years, but many return only after the Muslims conquer Egypt.
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.
The campaign quickly spreads throughout Spain, except for Granada, and destroys Jewish communities in Valencia and Palma De Majorca.
Pope Martin V issues a bull reminding Christians that Christianity was derived from Judaism and warns the Friars not to incite against the Jews.
The Jews were also forbidden from riding horses and holding judicial or civil posts, and were forced to wear a yellow patch for identification.
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.