1090 - 1170 ELIEZER BEN NATHAN OF MAINZ (RaBaN) (Germany)
Rabbi, commentator and historian. Rabbi Eliezer was known as one of the "elders of Mainz". His major work Even ha-Ezer (Stone of Help) is famous not only for its responsa but for the light it sheds on religious practice in Germany and France. As a historian his Kuntres Gezerot Tatnav (Booklet on the Massacres) of 1096 is one of our best sources for its accounts of the Rhineland massacres at the time of the First Crusade.