Salm Castle, locally known as Château des Comtes de Salm, is situated on a hill above the small town of Salmchâteau, in the Luxembourg province in the Wallonia region in Belgium.
I was unable to find much historical information about Salm Castle. Which is kind of strange as it was the seat of the powerful Counts of Salm.
One source says Salm Castle was built on 9th century foundations during the 14th century. Another claims the castle was built in the early 12th century and finished in 1150. None of the sources give any clue as to the reason of the demise of the castle.
That is all the information I was able to find. If you know more, please let me know.
At present all that remains is the sturdy gate building. Behind it is a private home and its occupants appreciate their privacy very much witnessing the forbidding signs all over the place. There is a hill directly east of the gate which, I think, must contain more ruined fragments of Salm Castle but it is to much overgrown with trees and undergrowth to see anything.