when the patriarchal seat was removed from the Pammakaristos to S.
Demetrius beside the Xyloporta. Nor could the conversion have been later
than 1598, the year in which Achmed Pasha--who converted the building
into a mosque--died.[333]

[Illustration: FIGS. 70 AND 71.]

[322] Phrantzes, p. 307.

[323] Patr. Constantius, p. 80.

[324] _Tagebuch_, p. 456. On the way eastwards from the residence of
the Moldavian agent (Bogdan Serai), says Gerlach, 'Auf diesem
Spazier-weg hat mir Theodosius auch den Trullum auf der Seiten des
Patriarchats gegen dem Sultan Selim gewiesen. Welches vor diesen ein
sehr weiter Platz gewesen, nun aber nichts mehr da als ein rundes
getaeffeltes Haus, wie ein kleines Kirchlein ist.' Cf. his statement
reported by Crusius in _Turcograecia_, p. 189: 'Patriarchatui
contiguum est monasteriolum Joannis Baptistae a Graecis
sanctimonalibus inhabitatum.'

[325] Phrantzes, p. 307; cf. _Turcograecia_, p. 189.

[326] It was also styled [Greek: Oaton], 'the Oval,' after the form of
its roof or of the body of the building itself (Synax., Sept. 14).
_Vita Stephani._ For the [Greek: Oaton], see Labarte, _Le Palais
imperial de Cons'ple_, pp. 62, 121, 122, 186.

[327] _Vita Stephani Junioris_, Migne, _P.G._ tom. 100, col. 1144
[Greek: en to hiero palatio, entha epilegetai ho Troullos hoper hemeis
Oaton kaloumen].

[328] Balsamon, vol. i. col. 501 [Greek: en to Troullo tou basilikou
palatiou].

[329] Theoph. p. 541.

[330] Pachym. i. p. 405.

[331] _Acta et diplomata Graeca_, iii. p. 65; cf. Paspates, _Great
Palace_, p. 248, Metcalfe's translation.

[332] _Proceedings of Greek Syllogos of C.P._, Archaeological
Supplement to vol. xvii. p. 8. His principal reason seems to be the
fact that a company of nuns occupied some of the cells in the old
monastery of S. John in Petra when Gerlach visited the city. But,
according to Gerlach, another sisterhood was at the same time
accommodated in the small convent of S. John the Baptist near the
patriarchate.--_Turcograecia_, p. 189.

[333] Cf. Paspates, p. 304.

CHAPTER XIII

THE CHURCH OF S. THEKLA,
TOKLOU IBRAHIM DEDE MESJEDI

In the quarter of Aivan Serai, a few paces to the rear of the
Heraclian Wall, stands a small mosque known as Toklou Ibrahim Dede
Mesjedi, the architectural features of which proclaim it at once to be
an old Byzantine chapel. There is no decisive tradition in regard to
the identity of the building. The Patriarch Constant