Why were both Louis IV and Frederick of Austria crowned on November 25, 1314?

Both Louis IV and Frederick of Austria were crowned on November 25, 1314, because the death of Henry VII in 1313 led to a disputed double election for the German throne.12

The two candidates were supported by different factions of the electorate, and because electoral custom at the time did not yet recognize a majority principle, both men proceeded with their own coronation ceremonies. The circumstances of their respective coronations were as follows:12

• Frederick of Austria: He was elected by four electors on October 19, 1314, and was crowned by the archbishop of Cologne, but at the incorrect location of Bonn instead of the traditional site of Aachen.1
• Louis IV: He was elected by five electors on October 20, 1314, and was crowned at the correct location of Aachen, but by the archbishop of Mainz, who was not the archbishop traditionally responsible for the ceremony.1

This impasse resulted in a civil war that lasted nearly eight years, until Louis IV decisively defeated Frederick at the Battle of Mühldorf in 1322.12