CCC 936
Profession of Faith›SECTION TWO I. THE CREEDS›CHAPTER THREE I BELIEVE IN THE HOLY SPIRIT›Paragraph 4. CHRIST'S FAITHFUL - HIERARCHY, LAITY, CONSECRATED LIFE
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).