The remains of the Castle can be visited
Château d’Havré

The castle ruin Château d’Havré is located in the Belgian town of Mons-Havré, in the Walloon province of Hainaut. Its history dates back to the 13th century.
History+
The origins of the castle can be traced back to 1226, although the Counts of Flanders and Hainaut had already fortified the site of Havré in the 11th century. In 1255, the castle passed into the possession of the Enghien family through the marriage of Ida of Mons to Engelbert of Enghien, who held it until 1423. Subsequently, ownership transferred to Christoph of Harcourt and later, through further marriages, to the Dunan, Longeville, and Croÿ families. Philippe II. de Croÿ, a general of Emperor Charles V, acquired the castle in 1518. After his death, his son Charles-Philippe inherited the estate, who in 1578 successfully withstood a siege by Don Juan de Austria and the Duke of Anjou without major damage.
Source: Wikipedia · Licence: CC BY-SA 4.0
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 50.4642, 4.0395