The apparent failure of the Council of Pisa seemed to bring discredit upon its supporters and to justify the action of those who had held aloof. But Rupert was not able to profit by any improvement this might [Sidenote: Death of Rupert.] have made in his position, as he died on May 18, 1410, a few days after Alexander V. His death forced upon the western electors the problem of a new election, and ten years’ experience had so fully convinced them of the difficulty of overthrowing the House of Luxemburg, that no candidate outside that house seems to have been considered. There were now three surviving Luxemburg princes: Wenzel, who still claimed to be King of the Romans; Sigismund, who had gained a considerable reputation by the success of his recent rule in Hungary; and the ambitious Jobst, who had added Brandenburg and Lausitz to his inheritance in Moravia, and was now the chief adviser of his cousin in Bohemia. On the great question of the Church these princes had taken opposite sides: Wenzel and Jobst had acknowledged the Council, while Sigismund had never withdrawn his allegiance from Gregory XII. The four Rhenish electors, who alone had voted in the election of Rupert, were equally divided on the same question. The Archbishop of Trier and the Elector Palatine were adherents of the Roman Pope, while the Archbishops of Mainz and Köln supported Alexander V. and his successor. As none of them were inclined to stultify their action in 1400 by recognising Wenzel, the ecclesiastical differences decided their votes. The electors of Mainz and Köln were in favour of Jobst, and the other two were inclined to support Sigismund.