[826]. Notitia, ad Reg. IV.
[827]. Codinus, De Officiis, pp. 107, 108; cf. Cantacuzene, iv. p. 11.
[828]. Critobulus, i. c. 18.
[829]. Leo Diaconus, pp. 78, 79; Anonymus, iii. p. 56. This was probably the tower to which N. Barbaro (p. 733) refers when, speaking of the two towers, on the opposite sides of the entrance to the Golden Horn, which supported the chain, he says, “Etiam una tore per ladi de la zilade, zoè una de la banda de Constantinopoli, l’altra de la banda de Pera, le qual tore vignia a far defexa assai.”
[830]. N. Barbara, pp. 722, 723.
[831]. Ville-Hardouin, c. 32.
[832]. Gyllius, De Top. CP., iv. c. x. “Adhuc Galatæ porta est, quæ appellatur Catena, ex eo, quod ab Acropoli usque ad eam portam catena extenderetur.” Cf. Theophanes, p. 609.
[833]. Dr. Paspates (Πολιορκία καὶ Ἄλωσις τῆς ΚΠ., p. 63) thinks the tower stood beside the Offices of the Board of Health, between the Galata Bridge and the Galata Custom House. He grounds this opinion on the existence of old ruins at that point. But the chain would never be placed aslant the harbour, as this view implies.
[834]. Theophanes, p. 609.
[835]. Cedrenus, vol. ii. p. 80.