Basilica Cistern

The Basilica Cistern, known as Yerebatan Sarayı ('Sunken Palace') in Turkish, is the largest ancient underground cistern in Istanbul, built during the reign of Byzantine Emperor Justinian I in the 6th century. It served as a massive ancient water reservoir, providing filtered water to the Great Palace and other buildings on the First Hill. This marvel of Byzantine engineering is supported by 336 marble columns, each approximately 9 meters high, arranged in 12 rows of 28. The dimly lit, mystical atmosphere, enhanced by subtle lighting and the sound of dripping water, creates a hauntingly beautiful experience. The most famous elements within the cistern are the two column bases featuring inverted heads of Medusa, whose origins and purpose remain somewhat of a mystery. Recently reopened after extensive renovation, the cistern now includes modern lighting and art installations, making the visit even more captivating.