Small Loona manor-house in Kihelkonna is a vivid example of a long and complex story of reaching it's present form. Oldest parts of the building date back to Middle Ages, the cellar uses battlements of an old vassal-castle built in the 16th century. Next major stage of building took place in 1785-1786, when the building was given most of it's present appearance.
Today Loona manor hosts a guesthouse, café and restaurant. The surrounding beautiful park is ideal for daily walks.
Reference: Visit Estonia
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.