Solre-sur-Sambre Castle is a water castle in Solre-sur-Sambre in the municipality of Erquelinnes, province of Hainaut, Wallonia, Belgium. It is one of the oldest fortified castles in Hainaut, and the

Hainaut, historically also known as Heynault in English, is the westernmost province of Wallonia, the French-speaking region of Belgium.