Dr. Tzafrir Barzilay is a Kreitman postdoctoral research fellow at Ben Gurion University of the Negev. Dr. Barzilay completed his PhD at Columbia University (2016) and then joined the Beyond the Elite research team as a postdoctoral fellow (2016-2019).  He is the author of Poisoned Wells: Accusation, Persecution and Minorities in Medieval Europe, 1321-1422 (University of Pennsylvania Press, forthcoming). Dr. Barzilay is currently investigating lay beliefs and practices pertaining to water in Jewish and Christian life from 1050 to 1450 in Europe, focusing on the tensions between the different meanings attributed to water by Jews and Christians in the context of its wide range of practical and ritual uses.