10. The Drum Dome 17 11. Diagram of Vaulting in Outer Narthex of S. Saviour in the Chora. 22 CHURCH OF S. JOHN THE BAPTIST OF THE STUDION 12. Plan of the Church 56 13. Long Section 57 14. Cross Section, looking east 58 15. Cross Section, looking west 58 16. Elevation of the Narthex 59 17. Longitudinal Section of western portion of the Nave--Half-cross Section of the Nave 59 18. Details of the Narthex, Colonnade, Doors, Windows 60 19. Details of Doors; Details from Church of S. Theodore; Details from S. Saviour in the Chora 61 CHURCH OF SS. SERGIUS AND BACCHUS 20. Inscription on the Frieze in the Church 74 21. Exterior View of the Dome 77 22. Brick Stamps in the Church 79 23. Ground Plan (looking up) 80 24. Gynaeceum Plan (looking up) 80 25. Plan at base of Dome (Cross Section) 81 26. Transverse Section 81 27. Section through South Aisle 81 28. Constructive Section of the Interior Arrangement, showing Gynaeceum Floor, Vaulting, Roof, and Springing of Dome 82 29. Constructive Section of the Rear, with Gynaeceum, Floor, and Roof removed 82 30. Sections of Mouldings 83 CHURCH OF S. IRENE 31. Ground Plan of the Atrium and Church _facing_ 104 32. Gallery Plan " 104 33. Longitudinal Section " 104 34. South Elevation " 104 35. West Elevation " 105 CHURCH OF S. ANDREW IN KRISEI 36. Plan of the Church (restored) 118 37. Plan of the Church 119 38, 39. Longitudinal Sections 120 40. Isometrical Section (restored) 121 CHURCH OF S. MARY PANACHRANTOS 41. Details of the Shafts in East Windows of South Church 124 42. Inscription on Apse of North Church 131 43. Plan of the Church (conjectural) 135 44. Plan of the Church 135 45. Section through the North Church 135 46. Section through the South Church 135 CHURCH OF S. MARY PAMMAKARISTOS 47. Plan of the Church (conjectural) 152