La Lucerne Abbey (Abbaye Sainte-Trinité de La Lucerne) was founded in 1143 by Hasculf de Subligny, son of Othoerne, the tutor of William Adelin, both of whom perished in the White Ship disaster of 1120, and later had the support of the English crown. The new monastery was settled from Dommartin Abbey near Hesdin. The foundation stone of the permanent buildings was laid in 1164 by Achard of St. Victor, who was later buried here. Construction lasted from 1164 to 1178 and was in the Romanesque style, in the restrained and sober manner of Cistercian architecture, except that the complex was dominated by an Anglo-Norman Gothic tower. Major structural renovations were carried out in the 15th and 17th centuries.
La Lucerne was the mother-house of four other Premonstratensian monasteries: Ardenne Abbey, Mondaye Abbey and Belle-Étoile Abbey (at Cerisy-Belle-Étoile) in Normandy, and Beauport Abbey in Brittany.
During the French Revolution, in 1792, the abbey was suppressed. Its buildings were at first turned into a cotton mill and then used as a source of stone.
In 1959, under the aegis of Abbé Marcel Lelégard (1925-94), the enormous task was begun, which still continues under the 'Fondation Abbaye de La Lucerne d'Outremer', of the restoration of the abbey. The first phase of the work was the reconstruction of the abbey church, particularly the ogival crossing vaults and the west front with its Romanesque portal, continuing to the refectory and cellars.
Work has continued since then and the tithe barn, the Romanesque lavatorium (the only one in Normandy), the medieval gatehouse (with its bakery and courtrooms), the dovecote, the park, the 18th century abbot's lodgings and the ponds are all now restored . The chapel of Blessed Achard is in the process of restoration.
References:Visby Cathedral (also known as St. Mary’s Church) is the only survived medieval church in Visby. It was originally built for German merchants and inaugurated in 1225. Around the year 1350 the church was enlarged and converted into a basilica. The two-storey magazine was also added then above the nave as a warehouse for merchants.
Following the Reformation, the church was transformed into a parish church for the town of Visby. All other churches were abandoned. Shortly after the Reformation, in 1572, Gotland was made into its own Diocese, and the church designated its cathedral.
There is not much left of the original interior. The font is made of local red marble in the 13th century. The pulpit was made in Lübeck in 1684. There are 400 graves under the church floor.