The Château d'Écouen, in Écouen, north of Paris, was built in 1538--50 for Anne de Montmorency, who was made "connétable" in 1538.
The Château d'Écouen was built in 1538--50 for Anne de Montmorency. This was in Écouen. This was north of Paris. Anne de Montmorency was made "connétable" in 1538.