According to a local tradition, a Latin inscription found in the underground galleries of the Château D'Agassac dates its construction back to the 13th century. But the first of its known lords was Guillaume-Raymond d'Agassac in 1172, Lord of Blanquefort.
Since 1238, the Gaillard de Gassac Family is owner of the seigniory of Agassac which extends more than 800 hectares. Its lord is vassal of king of England, Edward I of England, called in London in 1299 and took part in the defense of Borough in 1296.In 1357, the seigneury was sold to the lordship of Albret and some members of the family came to Agassac as Arnaud Amadieu I, Charles II of Albret or Jean II of Albret.From 1580 to 1841, the property belonged to Pommiers Family.
In 1792 the first vines was planted and the winery created. In 1841, the estate was purchased by Marcel Richier, one of the first big agricultural engineer in France. Today D'Agassac produces one of the wines of the Haut-Médoc with the best scores and the most awards.
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.