The ancient Hippodrome was begun by Septimius Severus in AD 203 and completed by Constantine the Great in AD 330. This was the center of Byzantine public life and the scene of splendid games and chariot races but also factional conflicts 

Today, there isn't much of the Hippodrome left to see, except for a small section of the gallery walls on the southern side, but the At Meydanı (park) that now stands on the site is home to a variety of monuments