Gutenburg Castle is the ruin of a hill castle above the village of Gutenberg in the county of Bad Kreuznach. The castle is first recorded in 1213 as castro Weitersheim. In 1334 the counts of Sponheim (Lower County of Sponheim) sold the castle, which had meanwhile been renamed the Gutenburg. After the sale it underwent a major conversion. Following the extinction of the House of Sponheim (the Kreuzenach line died out in 1414 and the Starkenburg line in 1437) the castle went to the Lower Sponheim lords (mainly the Margraviate of Baden and Electoral Palatinate). The castle lost its importance over time, was destroyed during the Thirty Years' War and fell into ruins. Today the castle ruins are in private ownership.
The castle consisted of an inner ward completely surrounded by a ring-shaped outer ward, protected by curtain walls with mural towers as well as a neck ditch. Considerable sections of the wall remain visible today.
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.