 This naturally caused great excitement at Constantinople, especially among the clergy, who were clearly not well disposed to Nestorius, the stranger from Antioch.Cyril appealed to Celestine of Rome to make a decision, and Celestine delegated to Cyril the job of excommunicating Nestorius if he did not change his teachings within 10 days.Nestorius had arranged with the emperor in the summer of 430 for the assembling of a council.