Coming up out of a hole in the ground, this strange column was once much taller and was topped by three serpents' heads. Originally cast to commemorate a victory of the Hellenic confederation over the Persians in the battle of Plataea, it stood in front of the Temple of Apollo at Delphi (Greece) from 478 BC until Constantine the Great had it brought to his new capital city around AD 330.
Though badly damaged in Byzantine times, the serpents' heads survived until the early 18th century. Now all that remains of them is one upper jaw, which was discovered in a basement of Aya Sofya and is housed in the İstanbul Archaeology Museums.