Château Bilquin de Cartier in Marchienne-au-Pont, Charleroi, is a substantial 17th and 18th-century fortress comprising brick and limestone buildings arranged around an honor court. Originally built by the Honoré family around 1635 on the Sambre river bank, it was expanded by forge owner Guillaume de Bilquin in 1695 and gained its dual name through the 1717 marriage of his daughter Marie-Agnès to Jean-Louis Cartier, son of the prince-bishop's treasurer. The castle played a pivotal role in French Revolutionary military history, serving as Republican headquarters during the 1794 siege of Charleroi and witnessing early tests of military ballooning. Though damaged by fire in 1932, restoration has preserved the honor court, porch, and two residential wings as cultural heritage.
