Súľov Castle was built in first third of the 15th century. By it’s size, the castle was very small. Its main function was to protect and watching near by road. After 1550 fire it was rebuilt to its original shape and size. In 1730 the castle heads military garrison. There used to be upper and lower castle. Heavy earthquake damage in 1763 accelerated its final destruction. Fortified formation was found in the Súlov castle village area dating from 12th to 13th century.
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.