that the church of SS. Peter and Paul, as the letters cited above make clear, was earlier than the church of SS. Sergius and Bacchus; secondly, that the basilica united to the latter sanctuary was dedicated to the two great apostles; for scenes which, according to one authority,[97] occurred in S. Peter's took place, according to another authority,[98] in the church of SS. Sergius and Bacchus. In the face of these facts, Procopius is either mistaken in regard to the relative age of the two sanctuaries, or he has not expressed his meaning as clearly as he might have done. To suppose that two sanctuaries dedicated to the great apostles were built by Justinian within a short time of each other in the same district, one within the palace, the other outside the palace, is a very improbable hypothesis. The question on which side of SS. Sergius and Bacchus the basilica of SS. Peter and Paul stood, seems decided by the fact that there is more room for a second building on the north than on the south of Kutchuk Agia Sofia. Furthermore, there are traces of openings in the north wall of the church which could serve as means of communication between the two adjoining buildings. Ebersolt, however, places SS. Peter and Paul on the south side of SS. Sergius and Bacchus.[99] A remarkable scene was witnessed in the church in the course of the controversy which raged around the writings known in ecclesiastical history as 'The Three Chapters,' the work of three theologians tainted, it was alleged, with the heretical opinions of Nestorius. Justinian associated himself with the party which condemned those writings, and prevailed upon the majority of the bishops in the East to subscribe the imperial decree to that effect. But Vigilius, the Pope of the day, and the bishops in the West, dissented from that judgment, because the authors of the writings in question had been acquitted from the charge of heresy by the Council of Chalcedon. To condemn them after that acquittal was to censure the Council and reflect upon its authority. Under these circumstances Justinian summoned Vigilius to Constantinople in the hope of winning him over by the blandishments or the terrors of the court of New Rome. Vigilius reached the city on the 25th of January 547, and was detained in the East for seven years in connection with the settlement of the dispute. He found to his cost that to decide an intricate theological question, and above all to assert 'the authority of S. Peter vested in him' against an imperious sovereign and the jealousy of Eastern Christendom, was no slight undertaking. Pope and Emperor soon came into violent collision, and fearing the consequences Vigilius sought sanctuary in the church of S. Peter[100] as he styles it, but which Byzantine writers[101] who record the scene name S. Sergius.