lochner - Triptych with the Virgin and Child in an Enclosed garden. 1445-1450. Oil on oak panel. 31.3 x 227.5 cm (central), 30,6 x 10,3 cm (each wing). Wallraf-Richartz Museum, Cologne, Germany lochner - Triptych with the Virgin and Child in an Enclosed garden. 1445-1450. Oil on oak panel. 31.3 x 227.5 cm (central), 30,6 x 10,3 cm (each wing). Wallraf-Richartz Museum, Cologne, Germany