Auchterhouse Castle is a 13th century castle located northwest of Dundee, Angus. The original castle was enclosed with walls, towers, and contained a keep. The castle may have been in ownership of the Ramsay family, who were hereditary Sheriffs of Angus. Sir William Wallace is alleged to have stayed at the castle and one its towers was named in his honour. King Edward I of England spent the night of the 20 July 1303 at the castle. The castle came into the possession of James Erskine, 7th Earl of Buchan who may have built the 17th century tower house.
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.