Abū Zikrī Sar Shalom (Yaḥyā) ben Moses ha-Levi served as raʾīs al-yahūd (nagid) in Fustat around 1170 to 1171 and again from around 1173 to 1195. Like his predecessors in office Maṣliaḥ (1127–1139), Samuel ben Hananiah (1140–1159), and his brother Nethanel ha-Levi ben Moses (1159–ca. 1169), he bore the title gaon. Before his appointment to the headship of the Jews, Sar Shalom held the post of av bet din (chief judge) in the branch of the Palestinian yeshiva in Damascus. According to the twelfth-century traveler Benjamin of Tudela, the gaon of the yeshiva was Sar Shalom’s brother Azariah.…