Gaasbeek Castle, located near Brussels in Sint-Martens-Lennik, stands as a significant Belgian cultural landmark with origins tracing to 1240. Built by Lambert of Leuven to defend the Duchy of Brabant, the current structure largely dates to the 16th century and features distinctive brick architecture. Now operating as a national museum since 1980, the castle showcases an extensive collection of paintings, sculptures, and decorative arts spanning various periods, complemented by regular special exhibitions and concerts. The grounds encompass a 49-hectare park dating to the 17th century, featuring impressive avenues and winding footpaths that invite exploration of this historic estate.