The Plasy Monastery was founded in 1144 by Duke Vladislav II as one of the oldest Cistercian monasteries in Bohemia. Monks from the Franconian Langheim settled Plasy. During the Hussites Wars in the first half of the 15th century buildings of the abbey were burnt out and almost all the goods were subsequently taken.
The monastery experienced a second period of prosperity after the Thirty Years‘ War: the baroque new buildings of the monastery, the large foursided courtyards and the pilgrimage church of Marianske Tynice are still characteristic of the landscape today – as are extensive agricultural areas for grain and fruit cultivation.
In 1826, the monastery building with the whole estate was purchased by Klemens von Metternich, who is buried in the Church of Saint Wenceslaus in the family tomb.
Varberg Fortress was built in 1287-1300 by count Jacob Nielsen as protection against his Danish king, who had declared him an outlaw after the murder of King Eric V of Denmark. Jacob had close connections with king Eric II of Norway and as a result got substantial Norwegian assistance with the construction. The fortress, as well as half the county, became Norwegian in 1305.
King Eric's grand daughter, Ingeborg Håkansdotter, inherited the area from her father, King Haakon V of Norway. She and her husband, Eric, Duke of Södermanland, established a semi-independent state out of their Norwegian, Swedish and Danish counties until the death of Erik. They spent considerable time at the fortress. Their son, King Magnus IV of Sweden (Magnus VII of Norway), spent much time at the fortress as well.
The fortress was augmented during the late 16th and early 17th century on order by King Christian IV of Denmark. However, after the Treaty of Brömsebro in 1645 the fortress became Swedish. It was used as a military installation until 1830 and as a prison from the end of the 17th Century until 1931.
It is currently used as a museum and bed and breakfast as well as private accommodation. The moat of the fortress is said to be inhabited by a small lake monster. In August 2006, a couple of witnesses claimed to have seen the monster emerge from the dark water and devour a duck. The creature is described as brown, hairless and with a 40 cm long tail.