I. Mediaeval Map of Constantinople by Bondelmontius _Frontispiece_ FACING PAGE II. The Myrelaion (since it was burned). (1) From the north-west. (2) From the south-east 20 III. (1) The Myrelaion (since it was burned). The Interior, looking east. (2) Suleiman Aga Mesjedi 24 IV. (1) Bracket in S. Saviour in the Chora. (2) Sculptured Slab in S. Theodore. (3) S. Mary Diaconissa. Heads of Windows in south arm. (4) Sculptured Slab on the West Wall 28 CHURCH OF S. JOHN OF THE STUDION V. (1) The Ruined Interior, seen from the minaret of the mosque. (2) The West Side of the Church 36 VI. (1) Façade of the Narthex. (2) The Ruined Interior, at the West End of the North Side 40 VII. (1) Entablature and Anta Capital in the Narthex. (2) Cornice in the Narthex, looking up 44 VIII. The Church from the south-east 48 IX. (1) The East End of the Church. (2) East End of the North Side of the Church 52 X. (1) The Cistern beside the Church. (2) Another View of the same 54 THE CHURCH OF SS. SERGIUS AND BACCHUS XI. The Interior of the Church, looking north-west 62 XII. (1) A Capital in the Church. (2) A Capital in the Narthex of S. John of the Studion 66 XIII. (1) The Church from the south-east. (2) View in the Gallery over the Narthex 70 XIV. (1) The Interior of the Church, looking north-east. (2) Portion of the Entablature in the Church 74 XV. The Baptistery of the Church of S. Sophia. (1) The Exterior from the north-east. (2) The Interior of the Dome, showing Continuous Pendentives 76 THE CHURCH OF S. IRENE XVI. The Church from the south-east 84 XVII. (1) The South Side. (2) The North Side 86 XVIII. The Interior, looking east 90 XIX. (1) Vaulting at the north-western Corner of the Atrium. (2) The Northern Arch of the Main Dome, seen from the South Gallery 92 XX. (1) Mosaic in the Soffit of an Arch. (2) Portion of the Mosaic Inscription on the Outer Arch of the Apse 96