Judah D. Galinsky teaches in the Department of Talmud at Bar-Ilan University. His research interests are in the fields of medieval rabbinic literature, codification, Jewish-Christian relations, book culture, and the practice of charity in the Middle Ages. He edited together with Elisheva Baumgarten Jews and Christians in Thirteenth Century France. His studies have been published in numerous journals including Journal of Interdisciplinary History, Harvard Theological Review, Jewish Quarterly Review, and AJS Review. He is currently working on a study of Jacob ben Asher's code of Jewish law, The Four Rows (Arba'ah Turim) written in 14th Century Toledo by an emigre from Germany.