The foundation of Tešanj Castle was started even before the Romans conquered the region. Exact dates are unknown. It was later enhanced by the Romans, Slavs and the Ottoman forces. It has been primarily a defensive fortification. Tešanj Castle is one of the most significant and biggest castles in Bosnia, with an area of 6,296 square metres. During the Ottoman period, the destroyed castle was rebuilt castle and it had a permanent garrison.
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.