Atmospheric underground water reservoir built in 532 AD, featuring 336 marble columns rising from shallow water in a dimly lit space. Look for the mysterious upside-down Medusa head columns and enjoy the haunting ambiance enhanced by classical music and dramatic lighting.
The Basilica Cistern — Yerebatan Sarnıcı in Turkish — is one of the most atmospheric underground spaces in Istanbul, located a short walk from Hagia Sophia in the Sultanahmet district of Fatih, Turkey. Built in 532 AD under Emperor Justinian I, it served as the primary freshwater reservoir for the imperial palaces and surrounding area, with a capacity of 80,000 cubic metres supplied by aqueducts from the Belgrade Forest north of the city.
The cistern measures 138 by 65 metres and is supported by 336 marble columns arranged in 12 rows of 28, each standing 8 metres tall and spaced 4.8 metres apart. The columns were repurposed from earlier Roman buildings and structures across the empire, resulting in a variety of capital styles — Doric, Ionic, Corinthian, and hen-egg — that a careful eye can distinguish as the visitor moves through the space. The water level today is shallow, and a raised wooden walkway guides visitors above the reflective surface, with the columns reflected in the still water below and atmospheric lighting — classical music plays softly in the background — creating one of Istanbul's most theatrical interiors.
The two most famous features are the Medusa head column bases located at the northwest corner. Two oversized Medusa heads — one placed upside down, one tilted on its side — serve as plinths for two of the columns. Their origins remain debated; the most widely accepted theory suggests they were placed this way simply for height adjustment, their orientation determined by structural convenience rather than symbolic inversion.
A recent expansion and renovation by Istanbul Metropolitan Municipality added a new exhibition space at the far end of the cistern, featuring the 'Hen and Chickens Column' — a column with carved teardrop-shaped indentations — and an installation replicating the ancient wishing well. The renovation extended visitor circulation routes and improved lighting throughout.
Visits take 30 to 45 minutes. The cistern is open daily and offers a cool escape from summer heat. Tickets are purchased on-site or online.
Good to know
- Hours
- 9:00-18:30 daily
- Best for
- history, photography, families, architecture
Location
Alemdar, Yerebatan Cd. 1/3, 34110 Fatih/Istanbul
41.0084, 28.9778 View on map
Highlights
- 336 marble columns reflected in still water, illuminated by atmospheric coloured lighting
- Medusa head column bases — one upside-down, one tilted — at the cistern's northwest corner
- Hen and Chickens Column with distinctive carved teardrop markings
- Classical music enhancing the subterranean, theatrical atmosphere
- Cool underground environment offering natural relief from Istanbul's summer heat
Tips for visiting
- Can be slippery - watch your step
- Visit during midday when Hagia Sophia is crowded
- Brings coins for wishing well
- Cool escape from summer heat
When to visit
Visit during midday when nearby Hagia Sophia draws the largest crowds, leaving the cistern quieter. The underground temperature stays around 12–15°C year-round, making it a good summer cooldown regardless of time of day.
Accessibility
The Basilica Cistern is accessible by a staircase of approximately 52 steps from street level. There is no elevator or ramp access to the main chamber; wheelchair users cannot access the cistern. The wooden walkways inside are flat and railinged, but the entry stairs are the primary barrier. Surfaces can be wet and slippery.
Frequently asked questions
How long does a visit to the Basilica Cistern take?
Most visitors spend 30 to 45 minutes exploring the walkways and taking photographs. The space is not large, but the atmospheric lighting and reflections reward a slow, unhurried pace.
Is the Basilica Cistern suitable for children?
Yes, children generally find the underground space and the Medusa heads fascinating. The wooden walkways are enclosed by railings and the space is safe. The dimness and occasional dripping water create an adventure-like atmosphere.
Is photography allowed?
Photography is freely permitted throughout the cistern. The low light and still water reflections make it popular for long-exposure photography; tripods are allowed in uncrowded periods.
Are there queues at the Basilica Cistern?
During peak summer months (July–August) queues can reach 30 to 45 minutes. Visiting in the late morning when nearby Hagia Sophia is at peak crowd is often a good strategy, as many visitors are elsewhere.