In the 13th century, the Gothic Vartenberk castle was built on the site of a guard castle to protect the Zittau Záhvožď trade route. The founder of the castle was probably Markvart of Březno.
In 1563 the castle was rebuilt as a Renaissance chateau which was visited even by Emperor Franz Joseph I. in 1865. In modern history, the chateau served as accommodation for holidaymakers, however, later on it was devastated by the Soviet army and on September 11 1987, it burned down.The chateau has not been fully repaired yet and isn’t accessible to the public. On the opposite side of Zámecký vrch hill there stands the Chapel of St. John of Nepomuk, which is connected to the chateau by linden alley. At the highest point of Zámecký vrch hill used to stand a cross. A Baroque sculpture of St. Norbert of Xanten and a Marian column with two angels by K. Steyer can be found below the castle. On the railings there are sculptures of four saints from 1726.
References:Sigmaringen Castle was first mentioned in the year 1077 in the chronicles of Petershausen monastery. The oldest parts of the castle are concealed beneath the alterations made during the 17th and the 19th centuries. The secret of the earliest settlement built on this defendable rock will never be fully revealed: large-scale excavation work would be necessary, which the extensive land development renders impossible. Judging from the many Roman remains unearthed in the area around Sigmaringen, the 12th century keep known as the 'Roman Tower' could be traced back to a Roman predecessor.
The castle remains that have been preserved (gate, great hall and keep) date back to the Staufer period around 1200. The castle remains were integrated into subsequent buildings. The foundations of the castle buildings are to a large extent identical to the surrounding castle wall.
These remains give us a good idea of how the castle might have looked during the 12th century.