ART OF THE SOFFER 1: Rav Soloman, the Archbishop of Burgos

The Spanish riots and pogroms of 1391 killed many Jews, and many, out of fear, converted to Christianity. 

Rabbi Joseph Abotrani was secretly helping and guiding the Jews who were secretly keeping Yiddishkeit. They were called the  Conversos. The church discovered this. The Archbishop, who was once the Rav of Burgos, realized that Rav Abotrani was a threat and needed to be dealt with..... by any means.