Frederick IV, Duke of Austria, declaring his fealty to the Emperor at the Council of Constance, from 'Chronik des Konzils von Konstanz'byUlrich von Richental
Council on Constance 1414-18; to settle the Western Schism; held in Konstanz, Germany; Sigismund (1368-1437), Holy Roman Emperor; Frederick IV (1382-1439) was later banned from the Council for siding with Antipope John XXIII;