[Illustration: PLATE XII. (1) SS. SERGIUS AND BACCHUS. CAPITAL. (2) S. JOHN OF THE STUDION. CAPITAL IN THE NARTHEX. _To face page 66._] Justinian was not the man to stand the affront. He ordered the praetor of the city to arrest the Pope and conduct him to prison. But when that officer appeared, Vigilius grasped the pillars of the altar and refused to surrender. Thereupon the praetor ordered his men to drag the Pope out by main force. Seizing Vigilius by his feet, holding him by his beard and the hair of his head, the men pulled with all their might, but they had to deal with a powerful man, and he clung fast to the altar with an iron grip. In this tug-of-war the altar at length came crashing to the ground, the Pope's strong hands still holding it tight. At this point, however, the indignation and sympathy of the spectators could not be restrained; the assailants of the prostrate prelate were put to flight, and he was left master of the situation. Next day a deputation, including Belisarius and Justin, the heir-apparent, waited upon Vigilius, and in the emperor's name assured him that resistance to the imperial will was useless, while compliance with it would save him from further ill-treatment. Yielding to the counsels of prudence, the Pope returned to the palace of Placidia,[102] the residence assigned to him during his stay in the capital. Probably at this time arose the custom of placing the churches of SS. Peter and Paul, and SS. Sergius and Bacchus at the service of the Latin clergy in Constantinople, especially when a representative of the Pope, or the Pope himself, visited the city. The fact that the church was dedicated to apostles closely associated with Rome and held in highest honour there, would make it a sanctuary peculiarly acceptable to clergy from Western Europe. This, however, did not confer upon Roman priests an exclusive right to the use of the building, and the custom of allowing them to officiate there was often more conspicuous in the breach than in the observance. Still the Roman See always claimed the use of the church, for in the letter addressed in 880 by Pope Julius VIII. to Basil I., that emperor is thanked for permitting Roman clergy to officiate again in SS. Sergius and Bacchus according to ancient custom: 'monasterium Sancti Sergii intra vestram regiam urbem constitutum, quod sancta Romana Ecclesia jure proprio quondam retinuit, divina inspiratione repleti pro honore Principis Apostolorum nostro praesulatui reddidistis.'[103]