Note 85 — Chapter I · CONSTANTINOPLE IN THE SIXTH CENTURY[3]

Κυκλόβιον or στρογγύλον; Procopius, ibid., iv, 8. Theophanes, an. 6165, p. 541, etc. Possibly it looked like the tomb of Caecilia Metella or a Martello Tower and was the prototype of the castle shown on the old maps as the “Grand Turk’s Treasure-house,” built in 1458 by Mohammed II within his fortress of the Seven Towers; Map by Caedicius, CP., 1889; Ducas, p. 317; Laonicus, x, p. 529. Most likely, however, it was a wall uniting five towers in a round. The Cyclobion is attributed to Zeno, about 480; Byzantios, Κωνσταντινούπολις, i, 312; Grosvenor, op. cit., p. 596.