St. Pius V

Saint Pius V, born Antonio Ghislieri in 1504, was a pope from 1566 to 1572 known for implementing the reforms of the Council of Trent, which aimed to address corruption and clarify church teachings during the Counter-Reformation. He is best known for excommunicating Queen Elizabeth I of England and for standardizing the liturgy with the Roman Missal, creating the Catholic Mass used today. His leadership emphasized discipline, doctrinal purity, and renewal within the Church. Canonized in 1712, he is recognized as a saint for his efforts to strengthen Catholic doctrine and promote spiritual renewal.