Valdštejn Castle (Waldstein) is an early Gothic fortress near Turnov, in the Czech Republic. The city was built on three sandstone cliffs in the second half of the thirteenth century by Counts of the Waldstein family. After 1420 the castle was occupied by the Hussites, then later by robber barons. In 1621 the abandoned castle was bought back by the Waldsteins, whose most illustrious member was Albrecht von Wallenstein. During the peak of the Baroque period, they built a pilgrimage church, dedicated to John of Nepomuk, in 1722 on the ruins of the castle.
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.