The Archdiocese of Poitiers is a Latin archdiocese of the Catholic Church in France. The archepiscopal see is in the city of Poitiers. The Diocese of Poitiers includes the two Departments of Vienne and Deux-Sèvres. The Concordat of 1802 added to the see besides the ancient Diocese of Poitiers a part of the Diocese of La Rochelle and Saintes.