There thus existed side by side in the city of Lisbon two metropolitical churches. Its formal title is the Cathedral and Metropolitical Church of Christ at Canterbury. In addition, the church is an extra-provincial diocese under the metropolitical authority of the archbishop. The fourteen archbishops each hold metropolitical authority within their respective provinces. Until 1974, these missionary dioceses were under the metropolitical oversight of the Archbishop of Canterbury. In 2004 he was made a metropolitical canon of the Province of Wales. During Breton independence the see of Dol briefly exercised metropolitical functions (mainly tenth century).