Portrait of Johann Friedrich, Elector of Saxony (1503-1554), half-length, in a black coat with fur trim; and Portrait of Martin Luther (1483-1546), full-length, in black robes, holding a prayer book in his hands, a red draped curtain behind

The present lot is a quirky and entertaining double portrait. Prism-shaped strips of wood have been laid down on panel and paint applied to paper covering these projecting strips. By rotating the panel, two different portraits are revealed.