Prof. Yom Tov Assis specializes in the history of Iberian Jewry and teaches medieval Jewish history at The Hebrew University of Jerusalem. Among his interests are the king and the Jews in the Crown of Aragon; economic history of the Jews in the Crown of Aragon and Navarre; scientific activities of Spanish Jewry and Jewish life and family in medieval Spain.

Yom Tov Assis is Professor of Medieval Jewish History at the Hebrew University of Jerusalem, former Chair of the Institute of Jewish Studies and the Dinur Centre for the Study of Jewish History, and currently Head of the Ben-Zvi Institute for the Study of Jewish Communities in the East and Hispania Judaica Centre for the Study of Jewish History and Culture in Sepharad. He has published extensively on the history of the Jews in the Middle Ages, and his books include The Jews of Santa Coloma de Queralt (1988), with R. Magdalena, The Jews of Navarre in the Late Middle Ages (1990), Aljamía romance en los documentos hebraiconavarros (siglo XIV) (1992), Jewish Economy in the Medieval Crown of Aragon (1997), and with R. Magdalena and C. Lleal, Navarra hebraica (2003).