On This Day

Isaac Orobio de Castro was a physician and former New Christian who endured investigation by the Spanish Inquisition before settling in Amsterdam and living publicly as a Jew. He became an articulate defender of Judaism in polemics with Christian thinkers and other religious critics. His writings reflect both extensive Christian education and growing engagement with rabbinic tradition. Orobio’s return was not a simple recovery of an unchanged ancestral identity; it required intellectual, ritual, and communal reconstruction. His biography illuminates the complex paths by which former conversos entered Western Sephardic Jewish life.