The Château de Montmort is a stately home built on the site of a medieval castle in the commune of Montmort-Lucy in the Marne département of France.
[1] The castle was the headquarters for Karl von Bülow's German Second Army during the First Battle of the Marne.
held a crucial meeting at the castle and agreed that the force was threatened by an Allied encirclement.
The subsequent retreat of Bulow's Second and Alexander von Kluck's First Armies was a crucial turning point of the First World War.
The higher structure, built later, carries the date of 1577.The building plan corresponds with a reference to the former castle in an old document: a square keep confined by circular towers.