Saint Peter's Cathedral Geneva (French: Cathédrale Saint-Pierre de Genève, pronounced [sɛ̃ pjɛʁ də ʒənɛv] ) is a historic church in Geneva, Switzerland. Since 1535 it has been the principal church of the Protestant Church of Geneva and a central site of the Protestant Reformation. It is closely associated with John Calvin, who preached there during his leadership of the Reformed movement.