In considering the original form of the church there is yet another important point to be noted. It will be seen from the plan that at the ground level the central area is not cruciform, but is rather an oblong from east to west with large arches on the north and south sides. This oblong is, however, reduced to a square at the dome level by arches thrown across the east and west ends, and this, in conjunction with the setting back of the dome arches already mentioned, produces a cruciform plan at the springing level. The oblong character of the central area is characteristic of the domed basilica and distinguishes this church from S. Andrew or S. Mary Panachrantos. The employment of barrel vaults in the ambulatory is also a point of resemblance to the domed basilica type, though the cross groin is used on the angles. [246] In this feature S. Mary Pammakaristos resembles S. Andrew and differs from S. Mary Panachrantos. We are probably justified in restoring triple arcades in all the three lower arches similar to the triple arcade which still remains in S. Andrew. The present arches do not fit, and are evidently later alterations for the purpose of gaining internal space as at the Panachrantos.
The hexagonal piers between the ambulatory and the inner narthex are not original, as is evident from the clumsy manner in which the vaulting descends on to them. They are the remains of the old western external wall of the church left over when it was pierced through, probably in Turkish times, to include the narthex in the interior area of the building. The piers between the ambulatory and the gallery on the north side of the church also seem to be due to openings made for a similar reason in the old northern wall of the church when that gallery was added in Byzantine days. The dotted lines on the plan show the original form of the piers and wall, as shown by the outline of the vault springings above. The inner narthex is later than the central church and is of inferior workmanship. The restored plan shows the probable form of the church at that date. The outer narthex was added at a subsequent period.
The Parecclesion.—The parecclesion forms a complete church of the 'four column' type with a narthex and gynecaeum on the west. On the north side the two columns supporting the dome arches have been removed, and their place is taken by a large pointed Turkish arch which spans the chapel from east to west as is done in the north church of the Panachrantos ([p. 129]). The southern columns are of green marble with bases of a darker marble and finely carved capitals both bedded in lead. One of these columns, that to the east, has been partly built into the mihrab wall. The arms of the cross and the western angle compartments are covered with cross-groined vaults, while the eastern angle compartments have dome vaults. The bema and the two lateral chapels have cross-groined vaults. As usual the apse is semicircular within and shows to the exterior seven sides, the three centre sides being filled with a triple window with carved oblong shafts and cubical capitals.
Fig. 47
Internally the church is divided by string-courses at the abacus level of the columns and at the springing level of the vaults into three stories. The lowest story is now pierced by Turkish windows but was originally plain; the middle story is pierced by single-light windows in each of the angle compartments, and in the cross arm by a three-light window of two quarter arches and a central high semicircular arch, similar to those in the narthex of the Chora. The highest story has a single large window in the cross arm.
To the east the bema arch springs from the abacus level and all three apses have low vaults, a somewhat unusual arrangement. This allows of an east window in the tympanum of the dome arch above the bema.
The dome is in twelve bays, each pierced by a window and separated by flat projecting ribs. It retains its mosaics, representing Christ in the centre surrounded by twelve prophets. Each prophet holds in his hand a scroll inscribed with a characteristic quotation from his writings. The drawing, for which I am indebted to the skill and kindness of Mr. Arthur E. Henderson, gives an excellent idea of the scheme of the mosaics.