Schloss Ringenberg is a moated castle located in the city of Hamminkeln, North Rhine-Westphalia. It stands in the southeast of the Ringenberg district, which gave the castle its name.
The castle traces its origins to a 13th-century fortress, built in the strategically important border region between the County of Cleves, the Archbishopric of Cologne, and the Prince-Bishopric of Münster. After being destroyed by Dutch troops, the estate came into the possession of Baron Alexander von Spaen in the 17th century, who rebuilt it.
Designated a historic monument in 1984, the site was listed as an archaeological monument three years later. Today, the castle is owned by the city of Hamminkeln, which operates its civil registry office there. The building also houses an artist studio center run by the Derik Baegert Society and a restaurant.
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.