The first known owner of Koberg was knight Erik Nipertz in the 15th century. Later it has been owned for example by royal Vasa and Leijonhufvud (Lewenhaupt) families. The oldest eastern part of the castle dates from the mid-1400s, the middle part from 1620s and the western part from the late 1700s. The other estate buildings were built in Neo-Romantic style in 1900-1904. Today Koberg castle is the residence of Princess Désirée, Baroness Silfverschiöld and her husband Baron Nicklas Silfverschiöld.
References: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.