The Italian reformer Peter Martyr Vermigli (1499-1561) arrived in Zurich in 1556 after long years of fleeing from the Roman inquisition, and taught there as professor of Old Testament studies. Moreover, he took part in the religious colloquy of Poissy as a church diplomat and wbecame an important collaborator of Heinrich Bullinger and Johannes Calvin.Michael Baumann examines the biography of Vermigli’s last years, his theology (trained in late medieval scholasticism, but reasoning biblically as a reformed theologian) and Vermigli’s impact on Zurich’s church history.