The oldest remains of Bordeaux, the Palais Gallien designates the Roman amphitheater of Burdigala, the 2nd century, which still has beautiful arches, a monumental door and structural elements. A large part of the site occupied by the building is now covered with houses. During the the French Revolution, parts of the building will then be demolished to allow the sale of lots of land and the construction of homes. The remaining vestiges will be classified and confirmed only from 1840. The name of 'Palace Gallien' is the fruit of several legends and confusions around the origin and the dating of the ruins.
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.