ers turn
towards Mecca. To the east a hall has been added for the accommodation
of women who attend the services; while on the west is another hall,
where the dervishes of the Teke attached to the mosque hold their
meetings. The north aisle also has been much altered and is covered with
Turkish domes.

The first impression produced by the interior of the building is that we
have here a church on the trefoil plan, similar to S. Mary of the
Mongols (p. 272) or S. Elias of Salonica, for the central area is
flanked by two semi-domes, which with the eastern apse form a lobed plan
at the vaulting level. A closer examination of the building, however,
will prove that we are dealing with a structure whose original features
have been concealed by extensive Turkish alterations, and that the
trefoil form is a superficial disguise.

The arches supporting the central dome on the north and south sides are
filled in with semi-domes which rest on arches thrown diagonally across
the 'aisles' on each side of the central dome. These arches are very
clumsily set to the sides of an irregular hexagon, with the central wall
arch much larger than the side arches. They have no responds, and have
every appearance of being makeshifts.

The eastern dome arch is prolonged into a barrel-vaulted bema, flanked
by shallow niches leading to the prothesis and diaconicon, and beyond
the bema is the semicircular apse. Only the diaconicon now remains,
covered by a cross-groined vault, and its apse pierced by a door leading
to the hall of the Teke. The place of the prothesis has been taken by a
similar door and a small Turkish dome.

The western dome arch is filled in with a triple arcade resting on two
marble columns with finely carved cubical capitals. Above the arcade is
a group of three windows whose heads are circular on the inside, but
pointed on the outside. To the west of this arcade is an oblong passage
corresponding to the 'inner narthex' of S. Theodosia. It is in three
bays. The central long bay is barrel-vaulted; the two outer bays open
into the north and south 'aisles'; the bay to the north is covered by a
Turkish dome, while that to the south has a cross-groined vault which
seems to be original.

Beyond this to the west is the outer narthex, a fine piece of work, and,
from the character of its details, of the same period as the western
dome arcade. It is in five bays. The three central bays correspond to
the 'inner narthex'; the middle bay