The Agora occupies an area of 70,000 square meters and is harmoniously integrated into the building grid of the ancient city, in a area of ten building blocks. It consists of an enormous rectangle with dimensions of 200 m x 182 m, which is surrounded by stoas, with Doric columns and pilaters. The stoas, which are 6 m wide, have four rooms at the rear. Two of these, on the same level as the main square, communicate with each other and, through the stoa, give on to the main square. The other two are at a higher level and open on to the streets flanking the outside of the complex.

The main gate of the Agora is in the east wing of it, and is 15 m wide, as wide as the street that passes through it, traversing the Agora and the city. Smaller gates are situated in south, north and west wing.

The east side of the Agora was devoted to the production and marketing of clay objects, vases and figurines. In the south wing there were shops selling liquid and solid products and in the west wing were the workshops producing aromatic goods, vases and figurines. The north part of the Agora had a more official, presumably adminitrative character. The building to the south-west corner of the complex, with a Doric peristyle on the ground floor and an ionic arcade on the first floor, has been identified as a public archive, on the basis of the clay sealing, bone-pens and a stone seal discovered buring the excavation of it.