The abbey of Saint-Jouin-de-Marnes was built in the 11th and 12th centuries to the site of 4th century oratory. The abbey was fortified in the 14th century and is an impressive size, measuring 72 metres long and 15 metres tall. It contains beautiful Poitevin Romanesque art. Visitors can also admire the arches of its doors with their sculpted motifs, the scene of the Last Judgment adorning the pediment, the square bell tower with round bays, and in the majestic chancel, the oak stalls and eagle-shaped lectern from the 17th century.
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.