From the Galata Bridge to Sehzadebasi - Strolling Through Istanbul: The Classic Guide to the City - page 225

Martin Harrison, who identified the ruins as those of the church
of St. Polyeuktos, about whom Corneille wrote one of his great
tragedies, Polyeucte. It was built in the years 524-7 by the Princess
Anicia Juliana. The church was an enormous edifice measuring 52
by 58 metres (compare the Süleymaniye, which is about 52 metres
square), fronted by an atrium measuring 26 by 52 metres, with a
small apsidal building on the north that may have been a martyrium
or a baptisry, as well as a structure at the north-west corner of the
site that may have been the palace of Anicia Juliana. The church was
essentially basilical in form but very probably domed, divided into
a nave and two side aisles by an arrangement of piers and columns.
The church was already abandoned at the time of the Crusader
sack of Constantinople in 1204, and its surviving works of art and
architectural members were taken of to adorn churches in western
Europe. Two pilasters of the church have been identified in the church
of San Marco in Venice; these are the Pilastri Acriani, the Pillars of
Acre, so called because they were believed to have come from Acre in
Syria. Other fragments, as we have seen, were used in the mimber of
Zeyrek Camii, the mosque in the south church of the Pantocrator.
Other architectural and sculptural fragments are preserved in the
Archaeological Museum, including part of a long and beautifully-
written inscription by which the church was identified. But the site
itself is now desolate, with only a single column standing amidst the
ruins.