First mentioned in 1349, but possibly older, Buben castle was home of the knights of Buben (means literally 'drum'), and held it´s name even under other owners. The family sold their first castle around 1378 (they had other castles then), but they use the family name Buben until today. The castle often changed owners together with the surrounding lands, it wasn´t used for living because of it´s isolated position in the 16th Century, and began to deteriorate but only slowly, because there was nobody around to disassemble the stone for their own use. It was a partial ruin in 1912, when first larger repairs were made by the Czech tourist club. A through conservation was done in the 1930ies, but a very unprofessional repair was done in 2010 with modern materials, which destabilized the repaired parts and a bastion completely collapsed in 2013. because the used concrete sucked in too much water and became too heavy for the old wall. The future for now is unsure.
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.