Gurre Castle was a royal castle built in the 12th century. Four towers and a perimeter wall were added in the 1350s; it was excavated in the 19th century (from 1835) and is now restored. It is first mentioned in court chronicles in 1364, when Pope Urban V sent a gift of relics to its chapel.
The castle is associated with a legend about a Danish king named Waldemar (usually identified with the 14th-century Valdemar IV Atterdag), his love for his beautiful mistress Tove Lille (Little Tove) and the jealousy of Queen Helvig. Over the centuries, this core saga was enriched by other legends, eventually growing into a national myth of Denmark. Valdemar IV died in the castle in 1375. The myth was put into poetical form by the novelist and poet Jens Peter Jacobsen; a German translation of his poems forms the text of the huge cantata Gurrelieder by Arnold Schoenberg.
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.