Mouson Hill is located to the west of the Acropolis, borders with Philopappos Hill and is the place where the buildings of the Pnyx, i.e. the area in which the Ecclesia convened, were located. It is estimated that the 5^th century BC 30.000 Athenian citizens gathered there to make decisions about the issues of the city, thus constituting the first form of democracy. Nowadays, the rostrum of the speakers and some foundations of the buildings, which existed there, are preserved.