There are four cisterns located between the Column of Marcian and the Monastery of Constantine Lips. They are located on the southern slope of Fourth Hill where the water supply line of the Aqueduct of Valens was located, thus indicating the water supply of these cisterns.

One of these cisterns is located underneath Yayla Kambur Mustafa Pasha Mosque. The original mosque, which was destroyed by a fire in 1918, was built over the cistern in the second half of the 17th century by Kambur Mustafa Pasha (d.1666). The cistern was renovated in 2003 during the rebuilding of the mosque. This cistern perhaps dates somewhere from the 4th to the 7th century. It has a trapezoidal plan, measuring 12.2 x 23.6 meters, and has 10 columns (2 rows of 5 columns). It is possible that its unique form indicates the existence of streets during the Byzantine era which continue follow the same basic route today. It now serves as the women’s prayer area of the mosque. There are also remains of a Middle Byzantine cistern across the street from the mosque.

Further south are the remains of a Byzantine structure are located north of Bıçakçı Alaaddin Mosque. While research of the structure has not been possible due to the apartment on top of it, it appears to be the remains of a cistern. The wall facing the mosque is 13.3 meters long with a height of 5 meters.

There is another cistern under the Ahmediye (Ortaçeşme) Mosque further west. This cistern was once located on the grounds of the Janissary barracks near Etmeydanı. The original mosque, which was destroyed by Mahmud II (1808–1839), was rebuilt in 1902. It has a rectangular plan, measuring 14.05 X 11.45 meters with a height of 7.4 meters. It has 9 columns (3 rows of 3 columns) with Corinthian capitals. It is not currently accessible to the public.

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A special thanks to Dr. Kerim Altuğ for his comments and corrections