Thorn Abbey Church is a Gothic church built mainly in the 14th century. The Benedictian abbey was originally founded in 975 by bishop Ansfried. The oldest parts in the western part date from c. 1150. The abbey was closed in 1797 and after that its church has server as a parish church. It was restored in 1860-1881 by Pierre Cuypers.
There is a famous mummy located in the glass sarcophagus in the church crypt. The rich interior contains Renaissance and Baroque style altars from 1624 and 1769, a font from the 15th century and organs from the 18th century.
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.