The ancient municipality of Oinoi is mentioned by Herodotus as one of the "most distant municipalities of Attica". According to Thucydides, at the beginning of the Peloponnesian War, in 431 BC, when the Spartans invaded Attica, Oinoi was the first settlement to be besieged, but not occupied. Most likely the inhabitants of Oinoi had taken refuge inside the ancient fortress, whose construction dates back to classical times.