Archæologists have not found it an easy task to trace the line of the walls of Constantine, especially on the landward side. It followed the coast of the Propontis from Seraglio Point, the Emperor adding height and strength to the wall of Severus and extending it to the gate of St. Æmilianus, which formed the south-west limit of his city. This section was thrown down by an earthquake and had to be rebuilt by Arcadius and Theodosius II. From St. Æmilianus the landward wall, with seven gates and ninety-five towers, stretched across from the waters of the Propontis to those of the Golden Horn, which was reached, it is supposed, at a point near the modern Djubali Kapou. This was demolished when the city had outgrown it, and Theodosius erected the new great wall which still stands almost unimpaired. The course of the old one can hardly be traced, but it is generally assumed that it did not include all the seven hills of Constantinople, though New Rome, like Old Rome, delighted in the epithet of Septicollis—the Seven-Hilled. Along the Golden Horn no wall was built until five centuries had elapsed. On this side Constantine considered that the city was adequately protected by the waters of the estuary, closed against the attack of an enemy by a huge iron chain, supported on floats, which stretched from the Acropolis of St. Demetrius across to the modern Galata. Confidence in the chain—some links of which are still preserved in the Turkish arsenal—seems to have been thoroughly justified. Only once in all the many sieges of Constantinople was it successfully pierced, when, in 1203, the Crusading Latins burst in upon the capital of the East. Within the area we have described, great if compared with the original Byzantium, but small in comparison with the size to which it grew by the reign of Theodosius II., Constantine planned his city. Probably no great capital has ever been built so rapidly. It was finished, or so nearly finished that it was possible to hold a solemn service of dedication, by May, 330—that is to say, within four years. Throughout that period Constantine seems to have had no thought for anything else. He urged on the work with an enthusiasm equal to that which Dido had manifested in encouraging her Tyrians to raise the walls of Carthage,—_Instans operi regnisque futuris._