The Roman Catholic Diocese of Séez (Latin: Dioecesis Sagiensis; French: Diocèse de Séez) is a diocese of the Roman Catholic Church in France. Originally established in the 3rd century, the diocese encompasses the department of Orne in the region of Normandy. The episcopal see is the cathedral in Sées, and the diocese is a suffragan of the Archdiocese of Rouen. History Saint Ebrulf, a native of the Diocese of Bayeux, founded, after 560, several monasteries in the Diocese of Séez; one of them became the important Abbey of Saint-Martin-de-Séez, which, owing to the influence of Richelieu, its administrator-general, was reformed in 1636 by the Benedictines of Saint-Maur. Rotrou II, Count of Perche, in fulfillment of a vow, established in 1122, at Soligny, the Abbey of La Trappe, in favour of which bulls were issued by popes Eugene III (1147), Alexander III (1173) and Innocent III (1203), and which was reformed in 1662 by Abbot Armand Jean le Bouthillier de Rancé. During the French Revolution the Trappists went with Dom Augustin de Lestranges, 26 April 1791, into Switzerland, where they founded the convent of La Val Saint, but returned to Soligny soon after the accession of Louis XVII. Among the abbots of the Trappist monastery at Soligny were: Cardinal Jean du Bellay, who held a number of bishoprics and resigned his abbatial dignity in 1538; the historian Dom Gervaise, superior of the abbey from 1696–8. On the occasion of the St Bartholomew's Day massacre in 1572 Matignon, leader of the Catholics, succeeded in saving the lives of the Protestants at Alençon. The cathedral of Séez dates from the twelfth century; that of Alençon was begun in the fourteenth. The diocese was re-established by the Concordat of 1802, which, by adding to it some parishes of the Dioceses of Bayeux, Lisieux, Le Mans and Chartres, and by cutting off some districts formerly included in it, made it exactly coextensive with the department. It is suffragan to the Archdiocese of Rouen in Normandy. In 1884 Monseigneur Buguet, curé of Montligeon chapel, founded an expiatory society for the abandoned souls in Purgatory, since erected by Pope Leo XIII into a Prima Primaria archconfraternity, which publishes six bulletins in different languages and has members in every part of the world. Notre Dame de la Chapelle Montligeon is also a place of pilgrimage. The Grande Trappe of Soligny still exists in the Diocese of Séez, which