From 1033, a castle dominated the valley. This is an alleu the related county rights extend in the country of Liège and to the abbey of Saint-Trond.
Waleran-Udon acquires this place and builds a powerful village which will experience a long series of devastation, fires and reconstructions over the centuries that will follow.
The title of Capital of the Duchy and the assured refuge that constitutes this reputedly impregnable fortress, the ardor of its dukes, and the interminable conflicts of the Middle Ages will earn the City many seats. For 6 centuries, the noise of cannons is the daily life of the inhabitants.
The greatest captains in history besieged the fortress: Henry IV of Germany in 1101, the princes of Orange in 1577, Alexander Farnese in 1578, the pincer of Condé in 1675 and the Duke of Malborough in 1703.
In the 18th century, the fortress was decommissioned. Limbourg then built its current history made of calm, sheltered by its walls.