Kortenberg Abbey was a Benedictine nunnery. The foundation, dating from before 1105 and traditionally dated 1095, was confirmed by Odo of Tournai in 1110.
The abbey was an important location in the constitutional history of the Duchy of Brabant, as it was where the Charter of Kortenberg was confirmed and where the council met that was instituted to oversee the charter's implementation.
Kortenberg was suppressed in 1798. It is now a diocesan retreat centre.
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.