Prandegg Castle is an elongated castle on a hilltop adjacent to a collection of rocky cliffs. It lies between two valleys formed by the Waldaist River and the smaller Prandegg stream. The first written mention of the castle occurred in 1287. Prandegg was for centuries intimately connected with Markt Zell (today Bad Zell) and the nearby Zellhof Palace. Since the local boundaries changed in 1784, the castle now belongs to the community of Schönau im Mühlkreis. Prandegg lies in the northern part of this community, between the Aist and the Naarn rivers, which in 853 CE was given by the Margrave William II to the Monastery of St. Emmeram in Regensburg.
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.