The Serpent Column (Greek Τρικάρηνος Όφις Trikarenos Ophis, Turkish, Yılanlı Sütun), also known as the Serpentine Column, Delphi Tripod, or Plataean Tripod, is an ancient bronze column at the Hippodrome of Constantinople (known as Atmeydanı "Horse Square" in the Ottoman period) in what is now Istanbul, Turkey. It is part of an ancient Greek sacrificial tripod, originally in Delphi and relocated to Constantinople by Constantine I the Great in 324. It was built to commemorate the Greeks who fought and defeated the Persian Empire at the Battle of Plataea (479 BC).