The first Teutonic castle in Zamek Kiszewski was surrounded by the Wierzyca and marshy grasslands. In 1454 the castle was destroyed by the armies of Gdańsk, and again in 1655 when it was taken over by the Swedes. The surviving remnants of the 14th century castle complex are its defensive walls with Teutonic keeps and a gatehouse. At the foot of the castle there is also a Neoclassical manor house, which dates back to 1856. At present, it is in private hands but is open for visitors.
References: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.