The identification of the cathedral and diocese with the three native saints can be dated back to Bishop Urban's claims for the diocese expressed in the building of the cathedral in the 1120s and the contemporary Llandaff Charters. According to the Book of Llandaff, the relics of Dyfrig were brought to the church in 1120, as well as the teeth of Elgar, and the episcopal church was built over the shrines, in honour of the apostle Peter and the 'holy confessors' Dyfrig, Teilo and Euddogwy. Relics of Teilo were also brought to the cathedral, and the Book of Llandaff describes the miraculous multiplication of the body of Teilo, explaining his presence at Llandeilo, Penally and Llandaff. Wade-Evans lists only Teilo as the patron of the cathedral, while Browne Willis only gives Peter, while Ecton lists both. The date when the apostle Paul was also associated with the cathedral as patron is unclear. The Book of Llandaff states that the relics of Dyfrig were enshrined in front of the altar of Mary, implying that she was also venerated here in the twelfth century.