Neuravensburg Castle was built at the end of the 12th century by the Counts of Argengau, mentioned in 1271, and destroyed in the Peasants' War of 1525. From 1614 to 1617, the castle was reconstructed and expanded into a castle by Abbot Bernhard Müller of the St. Gallen Abbey. In 1836, the castle was sold for demolition, and from 1837 to 1845, it was partially dismantled.
In 1992, the city of Wangen purchased the castle ruins and carried out further restoration work from 1995 to 1996. Besides the keep ruins with a viewing platform, which is accessible from the inside, the foundation walls of the palace are still preserved. The entrance to the castle ruins is located at Hagmühleweg. Following its establishment in 1987, the Neuravensburg Castle and Homeland Association took over the responsibility for the preservation and research of the castle complex.
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.