Château de Louppy-sur-Loison present remains date back to a castle built in the 13th or 14th century. It was built on an elevated piece of land in a loop formed by the Loison river. Originally the feudal castle had a quadrilateral ground plan with circular towers at its corners. It had a deep moat which was fed by the Loison.
The castle was abandoned and fell to ruin later and Simon II de Pouilly built a new Louppy-sur-Loison castle in the first half of the 17th century. The present church was built on the ruins of the old castle in 1878.
At present the remains of the old Louppy-sur-Loison Castle are part of the grounds of the village church and town hall. Its exterior can freely be visited. The New Louppy-sur-Loison Castle is only some 100 meters away.
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.