Eastern Europe’s First Great Rabbi

In the 11th and 12th centuries, the center of gravity of Ashkenazi intellectual life was in northeastern France and the Rhineland, although it would gradually move eastward over the course of the subsequent centuries. But Rabbi Isaac ben Moses, who became one of the great medieval experts on Jewish law, was born around 1180 in the German frontier province of Bohemia, and later settled in Vienna—a city almost as distant from the Ashkenazi heartland. He is better known by the name of his major work Or Zaru’a, taken from the verse from the book of Psalms, “Light is sown for the righteous, and gladness for the upright in heart.” Tamar Marvin tells his story: