Tarquenus of Aarb

Tarquenus of Aarb, also known as Tarquenus the Far-Seer and by many other epithets both reverent and condemnatory, was the prophetic religious leader who delivered the Tarquenian Revelation and led a great number of ancient Oritheans into the worship of the Rhantaseppa rather than the gods of the Thaedonu-Vaati. This precipitated the Schism Wars, culminating in the defeat of Tarquenus and his followers, and their flight across the ocean to Achuirea as the People of The Ten Thousand Ships. 
He is regarded as the first high priest of the Rhantaseppa and the spiritual patriatch of all the Rhantashani, who revere him almost as a god in his own right. The Tarquenian calendar used in Achuirea is named after him (in fact, it was initiated at his command upon reaching Achuirean shores), as are a number of places and other things; Tarquenus or Tarquen (Tarquena for girls) are still among the most common names chosen by Achuirean parents for their children. His tomb, located in a monumental shrine complex in the city of Mondolkiren in west-central Belekesh, is a holy site for the Rhantashani and attracts a huge number of pilgrims each year.
Conversely, the Vanir-Vaati curse Tarquenus as an arch-heretic, the high priest of apostasy, who turned his back on the ancestral gods of mankind and led millions into the depraved worship of an alien pantheon. His followers are condemned as unrepentant infidels who allowed a charlatan to lure them into abandoning the rightful veneration of their very creators. In some parts of Orithea and Rhydain, it is common to burn him in effigy on certain holy days and festivals. 
Little is known of his early life prior to the Tarquenian Revelation; he was supposedly a functionary in the temples of the Thaedonu-Vaati in the city of Aarb, but not a priest (sources often claim he was a temple scribe).