Yonatan Glazer-Eytan is a historian of early modern Spain and the wider Iberian world, with broad interests in interfaith and interethnic relations, religious culture, and law.

He is currently completing his first book project, Faith after Sacrilege: The Making of Spanish Catholicism in the Age of Confessional Conflict. The book explores how Spanish attitudes towards sacred objects came to define orthodoxy and belonging in an era that witnessed the elimination of religious diversity within the Iberian Peninsula as well as a series of confessional conflicts across Europe, the Mediterranean, and the Atlantic. Drawing on Inquisition trial records, state papers, and a wide variety of literary, visual, and material sources, this study challenges notions about the local and credulous nature of early modern Spanish Catholicism. It maps the movement of objects, people, and ideas across geographical and religious frontiers and shows how faith, doubt, and proof nourished one another in the making of a confessional identity rife with contradictions.

With Mercedes García-Arenal, he edited Forced Conversion in Christianity, Judaism and Islam: Coercion and Faith in Pre-Modern Iberia and Beyond (Brill, 2019) and a special issue on mixed marriages and conversion for Mediterranean Historical Review (2020). Future projects include a study of the relations between forced labor, ethno-religious identity, and the criminal underworld in the Spanish empire.

Glazer-Eytan completed his BA and MA cum laude in History at Tel Aviv University and earned his PhD in History from Johns Hopkins University in 2020. He was an Advanced Stage Researcher in the European Research Council-funded project CORPI at the Instituto de Lenguas y Culturas del Mediterráneo y Oriente Próximo (CSIC, Madrid). Prior to joining the Princeton faculty in 2023, he was the Lumley Research Fellow at Magdalene College, University of Cambridge.