Ancient Fortress of Oinoi, site Lefka, Municipality of Mandra-Eidyllia
The ancient municipality of Oinoi belonged to the Ippothoontida tribe. It is mentioned by Herodotus (5.74.2) as one of the "most distant municipalities of Attica". According to Thucydides (2.18.1-2), 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. The fortress of Oinoi is located on a low hill in the modern area of Oinoi (Mazi) of the Municipality of Mandra - Eidyllia in West Attica.
The floor plan of the fortress is rectangular and possibly divided into an acropolis and a lower city. A total of seven (7) towers are visible from the ancient fortress. The best-preserved side is the north with four (4) towers and the east, where there are two (2) towers. To the west, there is another tower, while in the south, although the existence of a wall has been confirmed by excavations, this is not visible.
The construction of the fortress dates back to classical times. Interventions and repairs were made over time and the place was used until Byzantine times.