220th Pope of the Catholic Church. Pontificate 1534 - 1549. He came to the papal throne in an era following the sack of Rome in 1527 and rife with uncertainties in the Catholic Church following the Protestant Reformation. During his reign, and in the spirit of the Counter-Reformation, new Catholic religious orders and societies, such as the Jesuits, the Theatines, the Barnabites and the Congregation of the Oratory, attracted a popular following and he convened the Council of Trent in 1545. He was a significant patron of the arts and employed nepotism to advance the power and fortunes of his family.