San Giorgio Monferrato Castle originates from the 10th century and is well-preserved. The Monferrato family built massive walls in the 15th century. It was damaged by Spanish army in the early 1700s.
Built on five above-ground storeys, plus attic and tower for a total of about 4300 square metres of floor space and more than 5000 covered (the difference between the two measurements is given by the thickness of the ancient walls), the property also has an Italian-style garden, a small hanging garden, two majestic panoramic terraces with views sweeping from the plains to the Alpine arc, and a centuries-old park of about 3.6 hectares.
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.