The stoa of Attalos was originally built along the Athenian Agora in 150 BCE.  It functioned as a commercial center and a shelter for wealthy and influential Athenians. The photograph above is of the lower level of a modern reconstruction of this ancient structure.  The stoa of Attalos consisted of two stories with a Doric colonnade on the ground floor, and an Ionic upper colonnade with a balustrade.  On both levels, there exist rooms behind the colonnades. The stoas in Herod's Temple no doubt resembled the stoa of Attalos.