Houska Castle is an early Gothic castle in the municipality of Blatce. It is one of the best preserved castles of the period. Some notable features of the castle include a predominantly Gothic chapel, green chamber with late-Gothic paintings, and a knight's drawing room.
Folklore considers this castle to cover one of the gateways to Hell, built to prevent demons (trapped in lower levels) from reaching the rest of the world.
Houska Castle was built in the second half of the 13th century probably on the orders of Bohemian ruler Ottokar II of Bohemia during his reign (1253–78) to serve as an administration center from which the extensive royal estates could be managed. Later on, it passed to the hands of the aristocracy, frequently passing from the ownership of one to another. The castle was built in an area of forests, swamps and mountains with no external fortifications, no source of water except for a cistern to collect rainwater, no kitchen, far from any trade routes, and with no occupants at its time of completion. From 1584 to 1590, it underwent Renaissance-style modifications, losing none of its fortress features as it looks down from a steep rocky cliff. In the 18th century, it stopped serving as a noble residence and fell into a state of disrepair before being renovated in 1823. In 1897, it was purchased by Princess Hohenlohe and in 1924, the times of the First Republic, bought by the President of Škoda, Josef Šimonek.
During World War II, the Wehrmacht occupied the castle until 1945. The Nazis were said to have conducted experiments into the occult. As of early 2020, the castle was open to the public and had been since 1999. Tourists may visit the chapel with fading frescoes and murals 'including pictures of demon-like figures and animal-like beings'.
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.