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.
The Chapel of St. Martin is the only completely preserved Romanesque building in Vyšehrad and one of the oldest in Prague. In was built around 1100 in the eastern part of the fortified outer ward. Between 1100 and 1300, the Rotrunda was surrounded by a cemetery. The building survived the Hussite Wars and was used as the municipal prison of the Town of the Vyšehrad Hill.
During the Thirty Years’ War, it was used as gunpowder storage, from 1700 to 1750, it was renovated and reconsecrated. In 1784, the chapel was closed passed to the military management which kept using it as a warehouseand a cannon-amunition manufacturing facility. In 1841, it was meant to be demolished to give way to the construction of a new road through Vyšehrad. Eventually, only the original western entrance was walled up and replaced with a new one in the sountren side. The dilapidating Rotunda subsequently served as a shelter for the poor.