The older Parthenon was still under scaffolding when the Persians sacked Athens in 480 BC, and the Athenians left its blackened ruins on the Acropolis for 33 years as a memorial. In 447 BC Pericles, leading the Delian League, had Ictinos and Callicrates build the structure we know, but it had no altar and no priestess. Its centerpiece was Phidias’s 40 foot gold and ivory statue of Athena, whose 40 talents of gold, over a thousand kilograms, were cast as removable plates that Pericles said could be melted down to pay for war. In practice it was an imperial treasury. Its builders called it the Hekatompedos, and a 2020 study by Janric van Rookhuijzen argues the name Parthenon first belonged to part of the neighboring Erechtheion.

The design broke convention with eight columns across the front and 17 down the sides, a floor that bulges more than 10 centimeters, and leaning, swelling columns. Those curves were long explained as optical corrections, but they are too small to see from a viewing distance and are better explained by drainage and a sense of living tension. The governing ratio is 9 to 4, not the golden ratio. The building later served as a church, a Catholic cathedral, and a mosque until 1687, when a Venetian mortar under Francesco Morosini ignited Ottoman gunpowder stored inside, killing over 300 people. Lord Elgin’s agents removed about half the surviving sculptures, and restoration since 1975 unveiled the western pediment in June 2026.

• The triglyph corner problem that pushed the architects from six columns to eight
• Adolf Zeising and the 1850s origin of the golden ratio myth
• How the 9 to 4 and 3 to 2 ratios match Pythagorean musical intervals
• Joan Breton Connelly’s reading of the frieze as the sacrifice of King Erechtheus’s daughter, drawn from a Euripides play found wrapping a mummy
• The rope that snapped as Morosini’s men tried to haul off the western pediment sculptures