The Cephisus River is the longest river, and Parnetha or Parnitha is the tallest mountain in Attica.
According to Plato, Attica's ancient boundaries were fixed by the Isthmus, and that in the direction of the continent they extended as far as the heights of Cithaeron and Parnes.
The process of the unification of Attica by Athens is not entirely clear, but it concluded at some point in the first half of the 7th century BC when Eleusis and the surrounding plains were joined to the Athenian state, and its inhabitants became citizens.
Attica (in Greek: Αττική, Attikí) is a nomos (prefecture) in Greece, containing Athens, the capital of Greece.
The process of how Attica was united by Athens is not entirely clear, but it concluded at some point in the first half of the 7th century BC when Eleusis and the surrounding plains were joined to the Athenian state, and its inhabitants became citizens.
Attica later became part of (successively) the Roman and Byzantine Empires, the crusader Duchy of Athens, and at last the Ottoman Empire.