Settlement of new cities or colonies was a significant tool used by the Hellenistic kings to achieve various goals. The dynamics of the Attalids in this field were strictly determined by changes in their geopolitical situation. A turning point in the history of the Attalid state was the Apamean Peace that in 188 ended the war of Rome and its allies against Antiochos III. Under the terms of the treaty the kingdom of Pergamon became a regional power. This opened up new prospects for the Attalids, but also presented them with new challenges. In the case of many foundations, it is difficult to determine clearly whether they were founded by the Seleucids or by Attalids, but it can be said that most of the Attalid foundations were established after 188. Considering colonisation activities of the kings of Pergamon, therefore, it must be remembered that they were able to benefit from the achievements of the Seleucids and only supplement them according to the needs and objectives they intended to achieve. The article examines possible reasons for the establishment of settlements by the Attalids: economic, building instruments of control over a given region, military purposes
