The walls along the Marmora and the Golden Horn represent the great restoration of the seaward defences of the capital carried out by the emperor Theophilus in the 9th century; while the walls between Tekfour Serai and the Golden Horn were built long after the reign of Theodosius II., superseding the defences of that quarter of the city in his day, and relegating them, as traces of their course to the rear of the later works indicate, to the secondary office of protecting the palace of Blachernae.
From Serai Keui); (7) Colossae (near Chonas); (8) Ceretapa Diocaesarea (Kayadibi); (9) Themisonium (Karayuk Bazar); (IO) Tacina (Yarishli); (II) Sanaus (Sari Ka y ak, in Daz Kiri); (12) Dionysopolis (Orta Keui); (13) Anastasiopolis, originally a village of the Hyrgaleis (Utch Kuyular); (14) Attanassus (Eski Aidan); (15) Lunda (Eski Seid); (16) Peltae (Karayashlar); (17) Eumenea (Ishekli); 08) Siblia (Homa); (19) Pepuza (Duman or Suretli); (20) Bria (Bourgas); (21) Sebaste (Sivasli); (22) Eluza or Aludda (Hadj imlar); (23) Acmonia (Ahat Keui); (24) Alia (Kirka); (25) Siocharax (Otourak), (26) Dioclea (Dola); (27) Aristium (Karaj Euren, in Sitchanli Ova); (28) Cidyessus (Geukche Eyuk); (29) Apia (Abia); (30) Cotyaeum (Kutaiah); (31) Aezani (Tchavdir Hissar); (32) Tiberiopolis (Amed); (33) Cadoi (Gediz); (34) Ancyra (Kilisse Keui) (35) Synaus (Simav); (36) Flaviopolis Temenothyrae (Ushak); (37) Trajanopolis Grimenothyrae (Giaour Euren, near Orta Keui); (38) Blaundus (Suleimanli).
The splendid wall, flanked by nine towers, that descends from the court of Tekfour Serai to the level tract below Egri Kapu, was built by Manuel Comnenus (1143-1180) for the greater security of the part of the city in which stood the palace of Blachernae, then the favourite imperial residence.
In 1868 the Imperial Lycee of Galata Serai was founded; most of the later generation of officials received their education there.
Still, the ramparts extending now from the Marmora to Tekfour Serai are to all intents and purposes the ruins of the Theodosian walls of the 5th century.
There is a good serai or inn for native travellers, and a dak bungalow or resting-place for Europeans.
Mustafa, who had crossed the strait and fled northwards, was taken, brought to Adrianople, and hanged from a tower of the serai (1422).
Like the Lyceum of Galata Serai in Constantinople, it has two sets of professors, Turkish and French, and a full course of education in each language, the pupils following both courses.
The cistern of Bin Bir Derek (cistern of Illus) with its 22 4 columns, each built up with three shafts, and the cistern Yeri Batan Serai (Cisterna Basilica) with its 420 columns show what covered cisterns were, on a grand scale.
The 1st hill is distinguished by the Seraglio, St Sophia and the Hippodrome; the 2nd by the column of Constantine and the mosque Nuri-Osmanieh; the 3rd by the war office, the Seraskereate Tower and the mosque of Sultan Suleiman; the 4th by the mosque of Sultan Mahommed II., the Conqueror; the 5th by the mosque of Sultan Selim; the 6th by Tekfour Serai and the quarter of Egri Kapu; the 7th by Avret Tash and the quarter of Psamatia.