Yerebatan Sarnıcı (Basilica Cistern): What It Actually Is
Yerebatan Sarnıcı — the Basilica Cistern — is a 6th-century Byzantine underground water reservoir in Sultanahmet, just a few minutes' walk from Hagia Sophia and the Blue Mosque. It's one of Istanbul's most atmospheric sights: 336 marble columns rising out of shallow, dimly lit water.
The cistern was built under Emperor Justinian I to supply the Great Palace of Constantinople and nearby buildings with water, and it stayed in use for centuries afterward. Today it's lit with colored lighting and ambient music, and it's become a recognizable filming location in its own right.
The main thing visitors come to see is at the far end: two column bases carved as giant Medusa heads, one placed sideways and one upside down — their origin and original purpose are still debated by historians.
Daytime ticket
~1,950 TRY
Night Shift ticket
~3,000 TRY
Visit duration
30–40 min
Ticket Options
Daytime entry
- Hours
- 09:00 – 18:30
- Price (approx.)
- 1,950 TRY (~€38)
Night Shift entry
- Hours
- 19:30 – 22:00
- Price (approx.)
- 3,000 TRY (~€58)
Museum Pass Istanbul
- Hours
- —
- Price (approx.)
- Not accepted here
| Option | Hours | Price (approx.) |
|---|---|---|
| Daytime entry | 09:00 – 18:30 | 1,950 TRY (~€38) |
| Night Shift entry | 19:30 – 22:00 | 3,000 TRY (~€58) |
| Museum Pass Istanbul | — | Not accepted here |
Before You Go
A few things make the visit smoother, since the walkways are narrow and the site gets busy:
- Book tickets online in advance to skip the queue, especially in peak season
- Visit early morning or late afternoon for smaller crowds
- Wear shoes with good grip — the walkways can be slightly slippery
- Amateur photography is fine, but tripods aren't allowed
- Allow 30–40 minutes to walk the full route and find both Medusa heads
What There Is to See
The Medusa Heads
Two carved Medusa head column bases at the far end of the cistern — one sideways, one upside down — are the site's signature feature and the most-photographed spot.
The Column Forest
336 columns, many reused from earlier Roman structures, rise out of shallow water under dramatic colored lighting.
The Atmosphere
Ambient lighting and music, plus the cool, damp underground air, make this one of the more atmospheric historic sites in the city — very different from the open-air landmarks nearby.
The Location
It sits right between Hagia Sophia and the Blue Mosque, so it's easy to combine with the rest of a Sultanahmet sightseeing route in one outing.
Common Mistakes to Avoid
Museum Pass Confusion
Assuming Museum Pass Istanbul covers entry
Solution
It doesn't — the Basilica Cistern is ticketed separately, so budget for a standalone ticket even if you're using a museum pass elsewhere in the city.
Wrong Ticket Type
Not checking whether it's a daytime or Night Shift ticket
Solution
The two options have different hours and prices. Double-check which one you're booking, especially if you're planning your visit around a specific time of day.
Slippery Footwear
Wearing slippery shoes
Solution
The stone walkways sit right above shallow water and can be damp. Flat shoes with grip are more comfortable and safer than sandals or smooth soles.
Missing the Medusa Heads
Missing the Medusa heads
Solution
They're at the far end of the site, not near the entrance — walk the full loop rather than turning back early.
Frequently Asked Questions
Planning a Longer Stay in Istanbul?
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