So far as the Harbour of Kaisarius is concerned, it could not have been another name for the Harbour of the Bucoleon, or the Harbour of Julian and Sophia, or the Harbour of the Golden Gate. For, as John of Antioch[1160] makes perfectly clear in his account of the defence of the city by Phocas against Heraclius, the Harbour of Kaisarius was situated in the same general district as the two former harbours, and to the west of them. Nor can the Harbour of Kaisarius be identified with the Harbour of Theodosius, inasmuch as the latter had been filled in and abandoned[1161] before the reigns of Phocas and Constantine IV., in the seventh century, when the Harbour of Kaisarius was still one of the principal ports on the southern coast of the city.[1162] The Harbour of Kaisarius must, therefore, have been either the Kontoscalion, at Koum Kapoussi, or another harbour between that gate and Vlanga. To suppose that it was the Kontoscalion, under an earlier name, is possible, since the name Kontoscalion, we have seen,[1163] appears for the first time in the eleventh century. Still the circumstance that a fire which started beside the Harbour of Kaisarius extended to the Forum of the Ox (ἕως τοῦ Βοός),[1164] situated at Ak Serai far up the valley that runs northwards from Yeni Kapou, suggests a situation nearer Vlanga. Turning, next, to the Neorion at the Heptascalon, it could, obviously, not be the Harbour of the Bucoleon, attached to the Imperial Palace; nor the Harbour of the Golden Gate, which was beyond the city limits; nor the Harbour of Theodosius, which had been filled in long before the reign of Cantacuzene, and which in 1400 and 1422, dates respectively not fifty and seventy years after that emperor’s reign, is described as a garden.[1165] The Neorion at the Heptascalon, therefore, must have been either the Harbour of Julian and Sophia, or the Kontoscalion, or an additional harbour between Koum Kapoussi and Vlanga. One objection to the first supposition is that the Harbour of Julian and Sophia was so notoriously known under its own special name, that reference to it by another designation is extremely improbable. Another objection is that the indications respecting the site of St. Acacius at the Heptascalon, however vague their character, furnish no ground for believing that the church stood in the vicinity of the Harbour of Julian and Sophia, but support, rather, the opinion that it stood in the neighbourhood of Boudroum Djamissi, in the quarter of Laleli Hamam, situated to the north-west of Koum Kapoussi.[1166]