Gammel Estrup Manor as we know it today was built in 1490, but excavations have revealed evidence of earlier constructions also mentioned in texts under the name Essendrup dating back to 1340.
The construction of Gammel Estrup was started by the contentious Lave Brock. But it was his great-grandson, Eske Brock who most people today think of in connection with the manor. Eske Brock was a nobleman and close friend of King Christian IV to whom he also served as a minister. Through Brock's detailed diaries we know a great deal about the King's life.
From 1930 the manor has served as a museum, showing the development of Danish nobility through the ages. The surrounding buildings support the museum, the nearby apple plantation and a horticulture research center.
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.