The Stoa of Eumenes is placed between the Theatre of Dionysos and the Odeion of Herodes Atticus, aling the Peripatos (the ancient road around the Acropolis). The king of Pergamon, Eumenes II, donated this Stoa to the Athenian city, during his sovereignty, which endured from 197 B.C. to 159 B.C. This elongated building, 163.00 m. long and 17.65 m. wide, had two storeys. The ground floor facde was formed from a colonnade of 64 doric columns, while the interior colonade consisted of 32 columns of lonic order. On the upper storey, the exterior colonade had the equivalent number of double-semicolumns of lonic order and the interior columns had the rather rare type of capitals, the Pergamene ones.
Nowdays, a visible part of the monument is the north retaining wall, reinforced with buttresses connected by semicircular arches. This wall was constructed in order to hold the north earth embankment in place and to support the Peripatos. Today are also visible: the krene (spring) included in the north wall, the stylobates of the inner colonnade on the ground floor and the foundation of the exterior colonnade. Besides, a part of the sub-structure of the east wall of the stoa has also survived, in addition to the west wall, who suffered some changes during the Roman perio, when the Odeion of Herodes Atticus was erected.