Richental, Ulrich von (c.1360-1437). Medium: pen and ink on paper. Date: 15th Century. Council of Constance 1414-18; held at Konstanz, Germany, to settle the Western Schism; Sigismund (1368-1437), Holy Roman Emperor; Adolph I, Duke of Cleves (1373-1448), made a Duke in 1417; Provenance: Private Collection. Photographic rights held by The Bridgeman Art Library.