Haapaniemi castle was one of the oldest manor houses in Finland, first record of Haapaniemi dates back to year 1469. The castle manor was built probably between 1450-1525 by the powerful nobleman Henrik Klaunpoika Horn, who owned it until 1540s. After Horns Haapaniemi was owned by another famous noble family Fleming.
The castle manor was ruined in the Great Wrath (1713-1721). Fiskars Ironworks bought manor properties in 1737. Today only an arched stone basement remains the manor house. Haapaniemi is nominated as National Built Herigate by National Board of Antiques.
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.