The Archdiocese of Rennes, Dol, and Saint-Malo is a Latin Church diocese of the Catholic Church in France. The diocese is coextensive with the department of Ille et Vilaine. The Archdiocese has 8 suffragans: the Diocese of Angers, the Diocese of Laval, the Diocese of Le Mans, the Diocese of Luçon, the Diocese of Nantes, the Diocese of Quimper and Léon, the Diocese of Saint-Brieuc and Tréguier, and the Diocese of Vannes.

The Diocese of Angers is a Latin Church diocese of the Catholic Church in France. The episcopal see is located in Angers Cathedral in the city of Angers. The diocese extends over the entire department of Maine-et-Loire.