The name of the Château de La Falize is derived from the Latin word Falise (Cliff, falaise) because of its position close to the top edge of a steep declivity of the valley sides of the river Meuse at the foot of which is city of Namur. Just south west of the Château the steep side of the Meuse valley is cut by the Houyoux, a tributary of the Meuse, which has created a smaller valley in the steep declivity of the Muse valley. The Houyoux is used by the land transport routes from Gembloux and Namur, to descend into the Meuse valley from the plain above.
In 1638, King Philip IV of Spain, leased this manor in 1638 to Gilles I of Glymes, Lord of La Falize, for the sum of 1500 florins. Honore de Glymes-Brabant, son of Ignace-François de Glymes-Brabant, Lord of la Falize built most of the current structure in 1757. The Château was the headquarters of William of Orange during the Siege of Namur in 1695.
References:Celje Castle was once the largest fortification on Slovenian territory. The first fortified building on the site (a Romanesque palace) was built in the first half of the 13th century by the Counts of Heunburg from Carinthia on the stony outcrop on the western side of the ridge where the castle stands. It had five sides, or four plus the southern side, which was a natural defence. The first written records of the castle date back to between 1125 and 1137; it was probably built by Count Gunter. In the western section of the castle, there was a building with several floors. Remains of the walls of this palatium have survived. In the eastern section, there was an enclosed courtyard with large water reservoirs. The eastern wall, which protects the castle from its most exposed side, was around three metres thicker than the rest of the curtain wall. The wall was topped with a parapet and protected walkway.