[1] The domain with its woods, river and vast hunting grounds was acquired in 1840 by King Leopold I at the request of his spouse Queen Louise-Marie.

At first, a hunting lodge was erected on a beautiful terrace overlooking a deep forested valley.

In 1960, it was the venue for the press presentation of King Baudouin's fiancé Dona Fabiola de Mora y Aragon.

The royal family also owned other castles and châteaux in the direct vicinity of Ciergnon.

The Royal Château of Ardenne was, according to the wish of Leopold II, converted into a luxury hotel.