The keep (donjon) of Crupet Castle was built in the 13th Century and originally consisted of a square tower surrounded by a moat. The entrance was probably protected by a drawbridge and portcullis. In the 16th Century, the keep was converted to a manor house. A corner tower was added, the windows were enlarged, and the timber top floor and roof were built. The drawbridge was probably also replaced at this time.
Crupet Castle is also known as "Carondelet Tower" and is in Belgium.
My reconstruction of the Donjon of Crupet Castle is 20 x 25 inches (64 x 80 studs) and is 24 inches high.
For more photos of my reconstruction of the Donjon of Crupet Castle
For photos of the real Donjon of Crupet Castle and other source