Castle Keep (1969)

Toward the end of World War II, a small company of American GI's occupy an ancient castle. Their commander has an affair with the countess in resident. One guy falls in love with a Volkswagon. A baker among them moves in with another baker's wife. A group of shell shocked holy rollers wander the bombed out streets. A GI art historian tries vainly to protect the castle and its masterpieces.