From high up on the rock of Susa, this castle has witnessed millennia of history. In 1046, Countess Adelaïde received here her husband Otto, Count of Savoy, bringing him the dowry of the marquisate of Susa and the county of Torino.
The Castle was presumed to be built in the Middle Ages, this also explains the presence of mullioned windows on the walls, a typical element of that era. Over the years he underwent several restorations, especially in the 18th century, which gave him the present appearance. Today, it houses in its interior the Historical Archives, the Civic Museum and the Library.
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.