Olympieion – Temple of Olympian Zeus

The Temple of Olympian Zeus was once a massive monument devoted to Zeus, bang in the centre of Athens. Construction spanned over seven centuries as successive rulers ensured it was big enough to reflect the mighty god’s stature. Almost 100 metres long and nearly 50 metres wide, the Olympeion was ultimately the largest ancient temple on the Greek mainland – but by the 15th century, only 20 columns remained standing. Today, there are 15.