Pope Pius V's Reforms

Timeline

1. 1566Vatican · VaticanThe cardinals elected the Dominican Michelangelo Ghislieri as pope, taking the name Pius V. His religious order background and the Trent reform context signaled that the papacy would enter a period of stricter disciplinary reform.
2. 1566–1570Vatican · VaticanPius V issued multiple papal bulls requiring Roman cardinals and clergy to reside in Rome, cutting lavish expenditures, and strengthening the Roman Inquisition's surveillance of heresy and banned books, implementing Trent's disciplinary requirements at the papal center.
3. 1568–1570Italian Peninsula · ItalyPius V confirmed and promoted the Roman Missal revised under Pius IV, requiring a uniform liturgy to replace local variants, and urged bishops everywhere to reform seminaries and diocesan administration according to Trent's canons, further unifying the Counter-Reformation at the liturgical and canonical levels.