Franzensburg palace was built in 1801-1836 in the style of and medieval castle. It is named after Francis II, the last Holy Roman Emperor. In 1806 the ferry started to be used to cross the pond from the mainland to the palace island. In winter it was replaced by a wooden bridge. The castle is surrounded with a 250-hectare castle park built in the late 18th century English style. Today the castle and park is a popular excursion destination. Guided tours are available in summer season.
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.