Achaemenid destruction of Athens
During the second Persian invasion of Greece, which took place from 480 to 479 BCE, Athens was captured and subsequently destroyed by the Achaemenid Empire. A prominent Greek city-state, it was attacked by the Persians in a two-phase offensive, amidst which the Persian king Xerxes the Great had issued an order calling for it to be torched.
Source: Wikipedia — Achaemenid destruction of Athens (CC BY-SA 4.0)