The first castle at Burgistein was built by Jordan I of Thun (later of Burgistein) in 1260. Jordan III of Burgistein fought on the losing side in the Battle of Laupen in 1339. In retaliation a Bernese army attacked and destroyed the castle in 1340. It was rebuilt in the following years.
In 1397 the Burgistein family died out and the castle was inherited by Werner Münzer. Over the following century it passed through numerous owners until 1484 when the Wattenwyl family acquired it. They owned the castle until 1714, when it passed to the Graffenried family. The 14th-century castle was rebuilt in the 15th and 16th centuries.
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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.