Llandaff Cathedral (Welsh: Eglwys Gadeiriol Llandaf) is an Anglican cathedral in Llandaff, Cardiff, Wales. It is the seat of the Bishop of Llandaff, head of the Church in Wales Diocese of Llandaff. The current building was constructed in the 12th century over the site of an earlier church. It is dedicated to Saint Peter and Saint Paul, and also to three Welsh saints: Dubricius (Welsh: Dyfrig), Teilo and Oudoceus (Welsh: Euddogwy).