EditorialDer Frankfurter Kreuzaltar (Die Auffindung und Verherrlichung des Wahren Kreuzes) / The Frankfurt Altarpiece of the Holy Cross. Date/Period: From 1603 until 1605. Oil on copper (silvered). Circa 133.6 ? 107 cm (52.5 ? 42.1 in); central panel: 48.5 ? 35...