 However, the French invasion of Savoy territories earlier that year had removed that obstacle.The Protestant leader John Calvin was based in Geneva from 1536 to his death in 1564 (save for an exile from 1538 to 1541) and became the spiritual leader of the city, a position created by the Grand Council as the city turned Protestant.Geneva became a center of Protestant activity, producing works such as the Genevan Psalter, though there were often tensions between Calvin and the city's civil authorities.