Pope Clement XIII (Latin: Clemens XIII), born Carlo della Torre di Rezzonico, was head of the Catholic Church and ruler of the Papal States from 6 July 1758 to his death in 1769. He was installed on 16 July 1758.
His pontificate was overshadowed by the constant pressure to suppress the Society of Jesus but despite this, he championed their order and also proved to be their greatest defender at that time. He was also one of the few early popes who favoured dialogue with Old Catholic Protestants and to this effect hoped to mend the schism with the Catholic Church that existed in England and the low countries. These efforts ultimately bore little fruition.