Istanbul Turkey Basilica Cistern Stock Photo 160519938Basilica,Basilica Cistern,Built Structure,Byzantine,Color Image,Column,Europe,History,Horizontal,Illuminated,In A Row,Indoors,Istanbul,Istanbul Province,No People,Photography,Religion,Sunken,Support,Supported,The Past,The Way Forward,Travel Destinations,Turkey,UNESCO World Heritage SitePhotographer Ken WelshCollection: The Image Bank © Ken WelshIstanbul, Turkey. The Basilica Cistern. In Turkish, Yerebatan Sarayi. Underground Byzantine water storage cistern also known as the Sunken or Underground Palace. The cistern is part of the Historic Areas of Istanbul, which is a UNESCO World Heritage Site.