Kirmasti Cistern is a short distance north of the Fatih Mosque complex (site of the former Church of the Holy Apostles). The remains of this cistern are now 20 x 20 meters, with a height of 10 meters. It has 9 columns (3 rows of 3 columns) spaced 3.90 meters apart, but probably originally had 16 columns (4 rows of 4 columns). Only 3 of its original ionic imposts and capitals remain, with the other six replaces by concrete columns. It possibly dates to the 12th century.