The Filopappos Monument was built around 114 - 116 A.D. by the Athenians in honor of the city's benefactor, the exiled prince of Commagene, Julius Antiochus Filopappos.

The monument is nearly 10 meters (33 feet) tall and contains a burial chamber. It is built of white Pendelic marble and veneered with slabs of Immitian marble (Pendeli and Immitou are two of the three large mountains that surround Athens). The north side of the monument, which was visible from the Acropolis, was the facade and at one time bore lavish architectural decoration.

As late as the 15th century A.D. the monument was preserved almost intact when Cyriacus of Ancona visited the site and copied the five inscriptions on the facade. The three inscriptions below the statues record the names of the persons represented. The central figure is Filopappos, son of Epiphanes, on the left is Antiochus, son of king Antiochus, and on the right was king Seleucus Nicator, son of Antiochus.

Recent investigations have certified that architectural parts of the superstructure of the monument were used for the construction of the Minaret in the Parthenon.

There are paths that transverse the hill, but the paved path to the top starts from Dionysiou Areopagitou, the walking path that connects the Acropolis to the Temple of Zeus.