Basilica Cistern

Overview

The Basilica Cistern (Yerebatan Sarnici) is a vast underground water reservoir built by Emperor Justinian in 532 AD. Its 336 marble columns, many recycled from ruined Roman temples, create a cathedral-like subterranean forest reflected in still water.

Highlights

• Medusa Heads: Two enormous carved Medusa heads serve as column bases — one sideways, one inverted — their origin remains a mystery.
• Atmospheric Lighting: Recent renovations added dramatic lighting and walkways that enhance the eerie underground ambience.
• Column Forest: 336 columns, each 9 meters tall, arranged in 12 rows stretch into the darkness.

History

Built to supply water to the Great Palace and surrounding buildings, the cistern could hold 80,000 cubic meters of water. It was forgotten for centuries until rediscovered in 1545 when a scholar noticed locals drawing water through holes in their basement floors.

Visitor Tips

• Recently Renovated: A major 2022 restoration added new exhibits and improved accessibility.
• Cool Escape: At a constant 9°C underground, it's a perfect refuge from summer heat.
• Duration: 30–45 minutes.