the Bulgarian aristocracy to end the religious and political conflict. His aristocratic opponents had feared that the Byzantine Empire would spread its influence through Christianity and destroy Bulgaria. At this time during the Middle Ages, Bulgarians considered "Christians" as equivalent to their traditional competitors the "Byzantines", or "Greeks", as they were most often called. Many Bulgarians thought that along with Christianity, they would be forced to accept the Byzantine way of life and morals. Choice between Rome and Constantinople Knyaz Boris realized that the Christianization of his subjects would result in greater Byzantine influence. The liturgy was performed in the Greek language, and the newly established Bulgarian Church was subordinate to the Church of Constantinople. The revolt against the new religion prompted the Knyaz to ask Constantinople to allow the Bulgarian Church independent status. When Constantinople refused to grant the Bulgarian Church independence, Knyaz Boris turned to the Pope. At the end of August 866, a Bulgarian mission led by the kavhan Peter arrived in Rome, carrying a list of 115 questions from Knyaz Boris. These had to do with the Christian way of life of the newly converted Bulgarians and the potential organization of a future Bulgarian Church under Rome's jurisdiction. On 13 November 866, the Bulgarian Knyaz received the Pope's 106 answers. Formosa from Portua and Paul of Populon led the Pope's mission. At the same time, the Pope sent other emissaries to Constantinople. When the Roman clerical mission arrived, Boris was sufficiently satisfied with Rome's response that he ordered the Byzantine mission to leave Bulgaria. This was viewed as an official change of Bulgarian orientation from Constantinople to Rome. Seeing Rome's emissaries there, the German mission also left Bulgaria, satisfied that Bulgaria will be in the Roman diocese. Emperor Michael III was displeased by Bulgaria's banishment of Byzantium's clergy. In a letter to Knyaz Boris, the Byzantine emperor expressed his disapproval of Bulgaria's religious reorientation by using offensive language against the Roman Church. This sparked the old rivalry between the two branches of Christianity. In less than two years, Bulgaria's name became widely known in Western Europe. In Constantinople, people nervously watched the events taking place in Bulgaria. They believed a pro-Roman Bulgaria threatened Constantinople's immediate interests. A religious council was held in the summer of 867 in the Byzantine capital, during which clerics criticized the Roman Church's actions of recruiting Bulgaria. Pope Nicholas I was anathematized.