Political event
After the death of Zemos and E'ath entering a new age, it was decided that Du'merh could not stand without a ruler any longer. To fulfil this purpose Irohda Ironheart stepped up and took the throne. The coronation had already been planned for years in advance but his supporters took this opportunity to do it sooner than they had planned.
The Coronation itself was magnificent and the use of short-lived wizards to perform various tasks is what many argue is one of the major reasons that the current era got the name of "Age of Magic". At a minimum, it popularised the short-lived wizards and displayed how proficient they had gotten to commoners.