 According to some sources, Frederick's brother-in-law Duke Rudolf III of Saxe-Wittenberg proposed his election as an anti-king by a subset of the princes; nevertheless, after several princes favoured Rupert of the Palatinate and no agreement over his election could be reached, the Welf duke left the assembly.Modern historians are at odds with each other whether Frederick was ever considered a candidate or even elected, since there is no documentary evidence for this.King Wenceslaus was finally declared deposed on 20 August 1400 and Rupert was elected King of the Romans the next day.