Fagnolle Castle is a 12th-century limestone fortress in Fagnolle, Philippeville, Namur province, Belgium. The castle served as the seat of government for the independent Barony, later County, of Fagnolle and features a distinctive square layout measuring 35 meters on each side with round towers at every corner. Though now ruined and privately owned, the castle remains a protected heritage site. Its strategic positioning and architectural design reflect the fortress's historical importance as a medieval stronghold in the Fagne region.
