Together with Saraçhane (D5/4) two open water reservoirs within the Constantinian walls (Crow et al., 2008, p. 129). 90 x ??? × 14 m (possibly deeper), the measurements make this cistern substantially larger than Binbirdirek.
Bricks measure 340-370 mm square × 40-50 mm thick, arranged in bands of about five courses (ca. 0.35 m high) that alternate with bands of mortared rubble (ca. 1.04 m high), faced with around seven courses of small, squared, limestone blocks (ca. 200-250 mm long x 120-150 mm high).
The cistern wall masonry resembles the masonry of the Land Walls (413) the most; the technique continued to be used until at least the middle of the fifth century. According to Bardill, this cistern can therefore be dated to around the first half of the fifth century. This cistern is possibly to be identified with the so-called Cisterna Theodosiana in the Notitia urbis Constantinopolitanae (VI, 8, ed. O. Seeck. (Bardil, 1997, p. 73-76).
According to Bardill, it is this cistern that should be identified with the [link] Cistern of Philoxenos, and not the Binbirdirek cistern. It is also referred to as Cağaloğlu Cistern (Byzantine Legacy).
