Basilica Cistern
Justinian's underground reservoir of 532 beneath Sultanahmet — 336 marble columns in a dim forest of water and light, with the two upside-down Medusa heads — reopened in 2022 after restoration.
Built in 532 under Hagia Sophia's contemporary, the Basilica Cistern stored 80,000 cubic metres of water piped 19 km from the Belgrade Forest for the Great Palace. Its 336 columns, salvaged from older temples, hold up a brick-vaulted ceiling 9 metres high over a space the size of two football pitches. Forgotten for a century after the conquest, it was rediscovered in 1545 by a scholar who noticed locals fishing through holes in their floors.
What to see
- The two Medusa heads at the far north-west corner, one sideways and one upside down — reused Roman blocks, positioned, some say, to neutralise her gaze.
- The Weeping Column, carved with peacock-eye tears, said to honour the slaves who died building the cistern.
- The 2022 restoration replaced the old walkways, added sculpture and a slow colour-changing light cycle, and drained the water to a shallow reflective layer — the carp remain.
Practical
Open daily from 09:00 to about 22:00; after 18:30 the ticket is more expensive but the atmosphere is best and the queues shorter. Foreign visitors pay a separate price and the Museum Pass does not apply. The entrance is opposite Hagia Sophia's tourist gate; allow 45 minutes. The floor is level throughout and the space is cool — a good midday escape in summer.
Frequently asked questions
Yes — it is the most atmospheric 45 minutes in the Old City and the one sight small children tend to love.
