Desperate faces turned to the Sun
In all Eainor's history, few religions have had such widespread and fierce a hold as the Church of the Sun. Although the Haendorionae began the celestial-centric worship most common in Eainor, only after the The Fires of Extinction and the separation of North and South did the focus shift to the Sun.
The High Priest was appointed to organize the religion so that customs could become indisputable and so that lower local priests and bishops could be appointed. (At this time the only hierarchy was the High Priest and lower religious officials, whatever you prefer to call them)