Cistern of Philoxenos

Cistern of Philoxenos
Interior of the cistern
Shown within Istanbul Fatih
LocationIstanbul
Coordinates41°0′27″N 28°58′28″E / 41.00750°N 28.97444°E / 41.00750; 28.97444

The Cistern of Philoxenos (Greek: Κινστέρνα Φιλοξένου), or Binbirdirek Cistern, is a man-made subterranean reservoir in Istanbul, situated between the Forum of Constantine and the Hippodrome of Constantinople in the Sultanahmet district. It has been restored and is now visited as a tourist attraction. The entrance is located at İmran Öktem Sokak 4. Binbirdirek Cistern is the second largest cistern in Istanbul after the Basilica Cistern.