The Archdiocese of Rennes is a Roman Catholic archdiocese located in the region of Brittany, France. It serves as the ecclesiastical jurisdiction for the city of Rennes and surrounding areas. The archdiocese is part of the larger ecclesiastical province of Rennes, which includes several other dioceses. Founded in the early Christian era, the archdiocese has a rich history and plays a significant role in the spiritual life of its community. The current archbishop is Pierre d'Ornellas, who has been in office since 2013. The archdiocese is known for its commitment to pastoral care, education, and social outreach.