The castle today is especially a vestige from the XVI century until the Dutch period. The monument has been classified as the most important historical monument in Walloon.It consists of three fortresses which are linked with each other by means of bridges. One of the most important components is the ducal palace, situated in the south west on the inner court. The room of Godfried of Bouillon, the first Latin ruler in Palestine, which has been chopped partially in the rock, dates from the XIII century. Of the medieval donjon remains only one piece of wall on the inner court.