Basilica Cistern (Yerebatan Sarnıcı)
A water cistern built by Emperor Justinian I between 526-527 to meet the city’s water needs. After the Ottoman conquest of Istanbul, it served as a water distribution center near Sarayburnu and Bahçe Kapısı.
It measures 140 meters in length, 70 meters in width, and has a rectangular shape. It consists of 336 columns arranged in 12 rows with 28 columns each, spaced 4.80 meters apart.
