The Academy of Athens forms part of the so-called "Neoclassical Trilogy" of the City of Athens: Academy - University - Library. It consists of aesthetically distinct parts that form a harmonic ensemble of built mass. A corridor connects the two lateral wings to the main body of the building, which -in its proportions of line and mass- is set-off by its Ionian-style entrance and its big pediment. The entrance has elements originating from the eastern side of Erechtheion, on Acropolis. The predominant material on the facets is marble. Overall, the building is a characteristic example of mature Neoclassicism.