CIC 194 The Apostles’ Creed is so called because it is rightly considered to be a faithful summary of the apostles’ faith. It is the ancient baptismal symbol of the Church of Rome. Its great authority arises from this fact: it is “the Creed of the Roman Church, the See of Peter the first of the apostles, to which he brought the common faith”.1
1 St. Ambrose, Expl. symb. 7: PL 17, 1196.