Stoa of Attalos. The Stoa of Attalos was a stoa in the Agora of Athens, Greece. It was built by and named after King Attalos II of Pergamon, who ruled between 159 BC and 138 BC. The current building was reconstructed in 1952-1956 by American architects along with the Greek architect Ioannis Travlos and the Greek Civil Engineer Yeoryios Biris. Typical of the Hellenistic age, the stoa was more elaborate and larger than the earlier buildings of ancient Athens. The stoa's dimensions are 115 by 20 metres and it is made of Pentelic marble and limestone. The building skillfully makes use of different architectural orders. The Doric order was used for the exterior colonnade on the ground floor with Ionic for the interior colonnade. This combination had been used in stoas since the Classical period and was by Hellenistic times quite common. On the first floor of the building, the exterior colonnade was Ionic and the interior Pergamene. Each story had two aisles and twenty-one rooms lining the western wall. The rooms of both stories were lighted and vented through doorways and small windows located on the back wall. There were stairways leading up to the second story at each end of the stoa. The building is similar in its basic design to the Stoa that Attalos' brother, and predecessor as king, Eumenes II, had erected on the south slope of the Acropolis next to the theatre of Dionysus. The main difference is that Attalos' stoa had a row of rooms at the rear on the ground floor that have been interpreted as shops. The stoa is identified as a gift to the city of Athens for the education that Attalos received there. A dedicatory inscription engraved on the architrave states that it was built by Attalos II, who was ruler of Pergamon from 159 BC to 138 BC. The stoa was in frequent use until it was destroyed by the Heruli in AD 267. The ruins became part of a fortification wall, which made it easily seen in modern times. In 1952-1956, the stoa was fully reconstructed and the Ancient Agora Museum was created by the American School of Classical Studies at Athens, with funding donated by the Rockefeller family. The reconstruction is particularly important in the study of ancient monuments because it is a faithful replica of the original building, to the degree possible within the limits of archaeological knowledge. The ceremony of the signing of the 2003 Treaty of Accession of 10 countries-Cyprus, the Czech Republic, Estonia, Latvia, Lithuania, Hungary, Malta, Poland, Slovakia, and Slovenia-to the European Union was conducted in the Stoa of Attalos on 16 April 2003. The Stoa of Attalos houses the Museum of the Ancient Agora. Its exhibits are mostly connected with the Athenian democracy. The collection of the museum includes clay, bronze and glass objects, sculptures, coins and inscriptions from the 7th to the 5th century BC, as well as pottery of the Byzantine period and the Turkish conquest.