Yehuda HeChasid

Yehuda HeChasid was a leader of the Chasidei Ashkenaz, a 12th- and 13th-century movement of Jewish mysticism in Germany, known for its asceticism and piety. He founded a yeshiva in Regensburg that attracted many students who would later become influential figures, including Eleazar of Worms, Yitzchak ben Moshe of Vienna, better known as the Ohr Zarua, and Barukh ben Shmuel of Mainz.