Avigdor ben Isaac Kara was a mystic, poet, philosopher and rabbi from Prague and a forerunner of the Jewish renaissance. He was chief rabbi of the Prague Jewish community and a Kabbalist, and attended audiences with Wenceslaus IV of Bohemia during which they discussed religious matters. He was friends and colleagues with Yom-Tov Lipmann-Muhlhausen and Menahem ben Jacob Shalem. Kara's frequent travels led to the loss of many of his manuscripts. His uncle was said to be Judah Leib the Elder. He led a life of poverty and collections were taken up on his behalf from Jewish communities. He sought financial assistance in the aftermath of the 1389 Easter attack in Prague.