Bolland Castle in Herve embodies medieval and Renaissance architectural layers spanning five centuries. The square-shaped keep, likely constructed in the 13th or 14th century, represents the castle's earliest fortified element, while significant architectural campaigns in the 16th and 17th centuries added substantial structures and refined the defensive design. Medieval lords d'Houffalize and Brandenberg were followed by the d'Eynatten, Berlo, and Groesbeek families in the 16th–17th centuries, each leaving architectural traces. The de Lannoys retained ownership for two centuries until the de Berlaymonts acquired it in the 19th century. Baron Adhemar de Royer de Dour de Fraula purchased the castle in 1920; his descendants continue residence there, maintaining the property as a living historical monument. A historic moat once surrounded the structure, and nearby stood a 17th-century convent of Recollects founded by Jean de Berlo, reflecting the estate's spiritual and temporal significance to the Hainaut region.