A Glass of Water (1979)

When a small state is threatened with capture by a much stronger one, only one thing can save it: the emergence of a competitor comparable to the invader. In a graceful and witty play by Scribe, hostilities unfold around a young officer, in whom the modest saleswoman of a jewelry store, the omnipotent Duchess of Marlborough and the Queen of England herself fell in love at the same time.