Basilica Cistern: Istanbul Underground Wonder
The Basilica Cistern (Yerebatan Sarnıcı) is the largest of several hundred ancient cisterns beneath Istanbul. Built by Emperor Justinian I in 532 AD, this atmospheric underground chamber held 80,000 cubic meters of water for the Great Palace. Today it is one of Istanbul most magical and Instagram-worthy attractions.
Tickets & Prices (2026)
Entry: 750 TL (approximately 20 EUR) for foreign tourists. Tickets can be purchased online at yerebatansarnici.com or at the entrance. The queue can be very long in summer — online tickets save significant time. The cistern is included in some museum pass combinations but NOT the standard Museum Pass Istanbul.
Opening Hours
Open daily from 9:00 AM to 7:00 PM (last entry 6:30 PM). Extended hours in summer. Closed on some public holidays. Weekday mornings are the least crowded time to visit.
What to See Inside
The cistern has 336 marble columns arranged in 12 rows of 28, each 9 meters tall. Most columns were recycled from ruined temples. The atmospheric lighting, reflections in the shallow water, and soft music create an otherworldly ambiance. The two Medusa head column bases are the star attraction — one is sideways and one is upside down, and nobody knows exactly why. Some historians believe they were simply the right size to support the columns. The Hen Eye Column has tear-drop patterns said to represent the tears of slaves who died building the cistern.
After the Recent Renovation
The cistern underwent a major renovation completed in 2022 that added new lighting, walkways, and art installations. The renovation was controversial among some visitors who preferred the old mysterious atmosphere, but the new installations add a modern artistic dimension. Photography and video are allowed and encouraged.
Tips for Your Visit
The temperature inside is 10-15°C cooler than outside — bring a light layer in summer. The cistern is small and a visit takes 30-45 minutes. It is wheelchair accessible via the new renovated entrance. Located just 150 meters from Hagia Sophia, so combine both visits. The gift shop has unique souvenirs including Medusa head replicas.