Washington Crossing the Delaware was painted by Emanuel Leutze in 1851, a German-born painter, living at the time in Germany.
The river you see in the picture is actually a stand in for the Delaware. It’s the Rhine. It’s sort of fitting, actually.
When Washington crossed the icy Delaware in the cold of winter on December 25, 1776, during the American Revolutionary War, he was on his way to fight German mercenaries that had been hired by the British.
In 2004 the painting became part of the permanent collection of the Metropolitan Museum of Art in New York City.