Franchimont Castle sits at the western end of a small hill overlooking the village of Franchimont. It is thought to have originally been built in the 11th century, as a stronghold of the Principality of Liège. The original building was extended several times during the Middle Ages, once after a fire in 1387.
In 1487 the castle was besieged, and around the same period the La Marck family took ownership of it. In the early 16th century the outer wall was built, with casemates and an artillery tower added.
Today the castle is owned by the town of Theux and is open to the public. The artillery tower at the north-east corner contains a small exhibition and the ticket office.
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.