The Château de La Roche-Guyon was built in the 12th century to guard the crossing of the Seine River. While the main castle lies at the base of the hill, the Keep is at the top with a commanding view of the river. Guy de La Roche fell at the Battle of Agincourt in 1415 after which Henry V of England took the French throne.
In World War II, the château was a headquarters for German Field Marshal Erwin Rommel. When the Allies landed on D-Day, Rommel had returned to Stemmer to be with his wife on her birthday.
Château Gaillard
Château Gaillard is a medieval castle ruin overlooking the River Seine. It was constructed in 1196 by Richard the Lionheart, King of England and also the Duke of Normandy. The castle consists of three enclosures separated by dry moats, with a central Keep in the inner enclosure.