Temple of Olympian Zeus
Date: ca. 520 BC
The Temple of Olympian Zeus, also known as the Olympieion or Columns of the Olympian Zeus, is a monument of Greece and a former colossal temple at the centre of the Greek capital Athens. It was dedicated to Olympian Zeus, a name originating from his position as head of the Olympian gods. Construction began in the 6th century BC during the rule of the Athenian tyrants, who envisaged building the greatest temple in the ancient world, but it was not completed until the reign of the Roman Emperor Hadrian in the 2nd century AD, some 638 years after the project had begun.
Size of temple: length 108m. x 41m. width,
columns : 17.5m. height
More info (wikipedia) : https://tinyurl.com/z9zj5gx