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Pius IV,1499–1565, pope (1559–65), a Milanese named Giovanni Angelo de' Medici; successor of Paul IV. He was probably not related to the great Medici family. His career in Rome began in 1527, and he held increasingly important offices under Clement VII, Paul III (who made him a cardinal), and Julius III. Cardinal Medici was one of the reform party, but he was no rigorist, hence he was out of favor with Paul IV. The great feature of his pontificate was the reconvening of the Council of Trent (see Trent, Council ofTrent, Council of,
1545–47, 1551–52, 1562–63, 19th ecumenical council of the Roman Catholic Church, convoked to meet the crisis of the Protestant Reformation.
..... Click the link for more information. ) for its last and most important session (1562–63). By quietly easing the difficulties of the council and publicly backing it, Pius gained new respect for the papacy and made himself one of the great popes of the Counter ReformationCounter Reformation,
16th-century reformation that arose largely in answer to the Protestant Reformation; sometimes called the Catholic Reformation. Although the Roman Catholic reformers shared the Protestants' revulsion at the corrupt conditions in the church, there was present
..... Click the link for more information. . He welcomed the final break with Protestantism, which the council brought about. His good political relations with Spain were in contrast with Paul IV's anti-Hapsburg policy. Pius's chief aid was his nephew, St. Charles BorromeoCharles Borromeo, Saint
, 1538–84, Italian churchman, b. near Lago Maggiore. His uncle, Pius IV, summoned Charles, a student at Pavia, to Rome in 1560. In rapid order he was made cardinal-deacon, administrator of the Papal States and of the archdiocese of Milan, and papal
..... Click the link for more information. . He was succeeded by St. Pius V.
original name Giovanni Angelo de' Medici. 1499--1565, pope (1559--65). He reconvened the Council of Trent (1562), confirming its final decrees