§936
Creed › … › Paragraph 4. Christ's Faithful - Hierarchy, Laity, Consecrated Life
IN BRIEF
The Lord made St. Peter the visible foundation of his Church. He entrusted the keys of the Church to him. The bishop of the Church of Rome, successor to St. Peter, is "head of the college of bishops, the Vicar of Christ and Pastor of the universal Church on earth" (CIC, can. 331).
Source: Catechism of the Catholic Church (Vatican.va)