The Nestorian Catholicos Mar Sabrisho I died and a new Catholicos had to be elected. The choice fell between two men named Gregory: Bishop Gregory of Nisibis and Professor Gregory of Seleucia. King The Sassanid emperor Khosrau II, the Sassanid emperor, stated only that his preferred candidate was Gregory, possibly meaning the bishop.  The king's influential Monophysite Miaphysite wife Shirin, however, disliked Gregory of Nisibis and preferred Gregory of Seleucia, who had once been her steward.  The Synod (council) rejected the king's initial candidate, taking advantage of the ambiguity of name, and chose Gregory of Seleucia, who became Mar Gregorius I. The king  Khosrau II was accordingly displeased, and reluctantly supported the elected candidate (after applying a hefty fine to him), and said, Patriarch he is and patriarch he shall be – but never again do I allow another election.