The Abbey of Saint-Evroul is a former Benedictine abbey, today in ruins. Its name refers to its founder, Ebrulf (Evroul), who founded a hermitage in the forest of Ouche around 560. The abbey was rebuilt around 1000. Robert de Grantmesnil served as abbot of Saint-Evroul, which he helped restore in 1050. He had become a monk at Saint-Evroul before becoming its abbot. Orderic Vitalis entered the abbey as a young boy and later wrote a history of the abbey. Saint-Evroul was famed for its musical programme and eleven monks brought its musical traditions to the abbey of Sant'Eufemia (now part ot town of Lamezia Terme) in Calabria. The abbey was rebuilt again between 1231 and 1284. In 1628 it was closed and demolished finally in the early 1800s.
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.