The Château de Sully-sur-Loire
The picture on my France calendar yesterday was of the Château de Sully-sur-Loire ... The château was the seat of the Duke de Sully, Henri IV's minister Maximilien de Béthune (1560–1641), and the later dukes of Sully. It is a château-fort, a true castle, built to control one of the few sites where the Loire can be forded.
Here are some photos of the interior from Wikipedia Commons. The interior shots remind me a bit of the place where Ignatius of Loyola grew up.