is covered by a low saucer dome on
pendentives, and is separated from the two side bays by columns set
against flat pilasters. The latter bays are covered by groined vaults
springing from the imposts of the capitals, which are of the Byzantine
Ionic type, with high carved imposts. They resemble the capitals in the
gallery of SS. Sergius and Bacchus, and are worthy of particular notice.

[Illustration: PLATE XXVIII.
(1) S. ANDREW IN KRISEI. OUTER NARTHEX.
(2) S. ANDREW IN KRISEI. INNER NARTHEX, LOOKING SOUTH.
_To face page 114._]

The two outer bays are separated from the central compartment of three
bays by strongly projecting pilasters. They are covered by low saucer
domes similar to the dome over the central bay, and communicate on the
east with the 'aisles.' Both outer and inner narthexes are in one story,
above which rise the windows of the western dome arch and the semi-domes
on north and south.

Turning now to the exterior, the south wall is the only outer wall which
is exposed at the ground level. It is faced with finely dressed and
polished stone, with thin joints, no tiles, and a stone-moulded cornice.
The windows are covered with four centred Turkish arches and are evident
insertions. Above the stone cornice rise the low drums of the
semi-domes. These, as well as the square base of the dome and the dome
itself, are faced with polished stone alternating with courses of three
bricks set in thick beds of mortar. The angles are plain, without
shafts, and the drums, dome base, and dome are crowned with stone
cornices moulded to a reversed ogee.

The north and south semi-domes are each pierced by three large windows,
which on the interior cut through the curved surface of the domes, and
on the exterior appear as dormers in the roof above the cornice.
Accordingly they are double glazed, with one glazed frame on the inside
corresponding to the curved dome surface, and a second upright glazed
frame on the outside. The roofs are covered with lead.

The central dome is circular inside, with a high drum pierced by eight
windows. On the outside it is octagonal, with a window on each side.
These have circular arched heads, but have no moulding, shaft, or inset
to either arches or sides. The dome is crowned by a moulded stone
cornice of the same type as that of the other walls.

In attempting to reconstruct the original form of the church we may
first note those features which are evidently Turkish. None of t