(Modern Greek Δέμα). Incomplete (?) towerless, polygonal wall, 4.3 km in length with numerous sally gates and two watchtowers that, at Ano Liosia, sealed the northern access between Parnes and Aigaleos from Thriasia into the Pedion. Constructed either in 404 BC after the banishment of the Thirty  or in 378/375 BC in the Boeotian War .
1 M. H. Munn, The Defense of Attica, 1993
2 A. Skias, Τὸ λεγόμενον Δέμα καὶ ἄλλα ἐρείπια [Tò legómenon Déma kaì álla ereípia], in: ArchE 1919, 35-36.
J. P. Adam, L'architecture militaire grec…