The Temple of Hera ("Heraion") is a temple dedicated to Hera, the Greek goddess of marriage. She was the wife of Zeus, the greatest of the Greek gods. The temple was built about 600 BC at Olympia, Greece. It is one of the oldest temples in Greece. It measures 50 meters by 18.75 meters. It was about 7.80 meters high. It had six Doric columns at either end and sixteen Doric columns on each side. The columns were originally made of wood, but were replaced with limestone at different times. The temple was destroyed by an earthquake in the early 4th century AD. It was not repaired.