Underground Cistern

Basilica Cistern – Istanbul’s Mysterious Underground Wonder

Location: Sultanahmet, Istanbul
Built: 6th century (Byzantine Empire)
Capacity: 80,000 cubic meters of water
Architect: Commissioned by Emperor Justinian I

Why Visit the Basilica Cistern?

• Largest underground cistern in Istanbul
• Marvel at 336 towering marble columns
• See the eerie Medusa heads hidden in the depths
• Step into history where James Bond’s From Russia With Love was filmed
• Escape the city’s heat into a mystical, shadowy underground realm

A Hidden Byzantine Masterpiece

The Basilica Cistern (Yerebatan Sarnici) is one of Istanbul’s most fascinating historical sites. Located just steps from Hagia Sophia, it lies beneath the heart of Sultanahmet, revealing a different side of Byzantine architecture.

Originally built in 532 AD by Emperor Justinian I, the cistern was designed to store water for the Great Palace of Constantinople.
It continued to supply water even after the Ottoman conquest in 1453.
The cistern covers 9,800 square meters and can hold enough water to fill 32 Olympic swimming pools!

Inside the Basilica Cistern

• Step into a dimly lit, eerie atmosphere – with soft lighting reflecting off the still waters.
• Marvel at 336 massive columns, arranged in 12 rows of 28 columns each, standing 9 meters tall.
• Discover the Mysterious Medusa Heads

Two Medusa heads rest at the bases of columns in the darkest corner.
One is tilted sideways, the other upside down – their purpose remains a mystery. Theories suggest they were placed that way to neutralize Medusa’s mythical powers. Watch the giant fish swimming in the black waters, adding to the surreal experience.

Movie Fame: Featured in the James Bond film From Russia With Love (1963).

Fun Facts & Secrets of the Cistern

• Built with repurposed materials from ancient temples – leading to unique, mismatched column designs.
• Advanced Byzantine engineering: Walls were coated with a thick waterproof mortar to prevent leaks.
• Forgotten for centuries: Rediscovered by chance when locals told Ottoman officials about pulling water from their basements.
• Spooky & atmospheric: The combination of dim lighting, water ripples, and Medusa statues creates a mysterious aura.

How to Get to the Basilica Cistern

By Tram: Take the T1 tram to Sultanahmet station.
Walking Distance: Steps away from Hagia Sophia & Blue Mosque.
Opening Hours: 9:00 AM – 7:00 PM (hours may vary).

Best Time to Visit

Early Morning (9:00 AM) – Avoid the crowds and have the cistern almost to yourself.
Evening Visits – Experience the dramatic lighting and quiet ambiance.
Hot Summer Days – Escape the heat of Istanbul in the cool underground depths.

Final Thoughts: A Must-See in Istanbul!

If you love hidden gems, history, and eerie, beautiful architecture, the Basilica Cistern is an unmissable experience in Istanbul. Step into the past, discover Medusa’s secrets, and explore a mysterious underground world!