In the 11th century there was wooden fort on the site of current castle, built by Robert Mesnières. It was demolished in the 15th century and the new Renaissaince castle was built in the early 1500s and inaugurated in 1546. It was influenced by famous castles of Loire valley.
In 1590 Château de Mesnières was moved to the possession of Fautereau family. Louis Fautereau enlarged and decorated the castle and built a new chapel. However after the Great Revolution it was used as a prison and later orphanage. The castle was badly damaged by fire in 2004. Today it is restored and open to the public.
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.