Reuland Castle in Burg-Reuland, near the border of Germany, was probably built after 1148 by the von Reuland nobles. The castle was sold in 1322 to Count John the Blind and the King of Bohemia. On May 24, 1384, King Wenzel of Luxembourg designated Edmund von Engelsdorf the Secretary of the Treasury of Luxembourg, and donated the Castle and the Reuland Domain to him.
The castle's origins can be traced to the 9th and 10th centuries. The entire complex has been modified significantly since then, most importantly to adapt its defences to artillery attacks in the 15th century. Although it was destroyed by French revolutionary troops at the end of the 18th century, it has recently been restored to its former medieval glory.
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.