It was built to commemorate the Greeks who fought and defeated the Persian Empire at the Battle of Plataea in 479 BC in Delphi. In 324 AD, Serpertine Column was moved to Constantinople by Constantine I. Heads of the Serpent Column got lost after 1700 AD. One of the head was found in 1848 AD by architect Gaspare Fossati who restored the Hagia Sophia. Today, head of the Serpent Column is exhibited in the Istanbul Archaeology Museum.