A Guide to the Basilica Cistern in Istanbul

The Basilica Cistern, also known as the Yerebatan Cistern or the Sunken Palace, is a large underground cistern in Istanbul, Turkey. It was built in the 6th century AD during the reign of Emperor Justinian I and was used to store water for Constantinople (now Istanbul). The cistern is located in the historical district of Istanbul, near the Hagia Sophia and the Blue Mosque.

The Basilica Cistern is a vast, underground chamber that measures approximately 140 meters (460 feet) long and 70 meters (230 feet) wide. It is supported by 336 marble columns arranged in a grid pattern, and the space between the columns is filled with water. Arches support the ceiling, and the walls are lined with brick and stone. The cistern is illuminated by a series of tiny lights, which gives it a mysterious and otherworldly atmosphere.

Visitors to the Basilica Cistern can explore the underground chamber on a series of raised walkways that lead through the cistern. The cistern is home to two ancient columns, the "Egyptian" and "Medusa" columns, which are carved with images of Egyptian gods and mythical figures. The cistern is also home to several fish and turtles swimming in shallow waters beneath the walkways.

The Basilica Cistern is an essential cultural and historical landmark in Istanbul and is a popular tourist destination. It is open to the public and can be visited daily from 9:00 AM to 6:00 PM (last admission at 5:00 PM). Tickets can be purchased at the entrance to the cistern.