Fruzhin, Sigismund's vasal who also was on the conference. Council of Constance From 1412 to 1423, Sigismund campaigned against the Republic of Venice in Italy. The king took advantage of the difficulties of Antipope John XXIII to obtain a promise that a council should be called in Constance in 1414 to settle the Western Schism. He took a leading part in the deliberations of this assembly, and during the sittings travelled to France, England, and Burgundy in a vain attempt to secure the abdication of the three rival popes. The council ended in 1418, having resolved the Schism and — of great consequence to Sigismund's future career — having the Czech religious reformer, Jan Hus, burned at the stake for heresy in July 1415. The complicity of Sigismund in the death of Hus is a matter of controversy. He had granted Hus a safe conduct and protested against his imprisonment; and Hus was burned during Sigismund's absence. When at one point during the council a cardinal corrected Sigismund's Latin, Sigismund replied Ego sum rex Romanus et super grammaticam ("I am king of the Romans and above grammar"). Thomas Carlyle nicknamed Sigismund "Super Grammaticam". His main acts during these years were an alliance with England against France, and a failed attempt, owing to the hostility of the princes, to secure peace in Germany by a league of the towns. Also, Sigismund awarded Brandenburg (which he had recovered after Jobst's death) to Frederick of Hohenzollern, burgrave of Nuremberg, in 1415. This step made the Hohenzollern family one of the most important in Germany. Sigismund began to shift his alliance from France to England after the French defeat at the Battle of Agincourt. The signing of the Treaty of Canterbury on 15 August 1416 culminated diplomatic efforts between Henry V of England and Sigismund and resulted in a defensive and offensive alliance against France. This, in turn, led the way to the resolution of the papal schism. The close relationship that developed between Henry V and the Emperor resulted in Sigismund being inducted into the Order of the Garter. Hussite Wars In 1419, the death of Wenceslaus IV left Sigismund titular King of Bohemia, but he had to wait for seventeen years before the Czech Estates would acknowledge him. Although the two dignities of King of the Romans and King of Bohemia added considerably to his importance, and indeed made him the nominal