The Parthenon glows gold because of its mountain source
The ancient temple was built using marble from Mount Pentelicus, a specific stone that develops a unique golden patina as it ages over the centuries.
The Parthenon was constructed in the 5th century B.C.E. using white marble hauled from the northeastern slopes of Mount Pentelicus. While the stone appears bright white when first quarried, it contains trace amounts of iron. Over thousands of years, exposure to the elements causes this iron to oxidize, gifting the temple the distinctive golden glow that defines the Athenian skyline today.