Following the defeat of Aristonicus, Pergamon’s former kingdom was incorporated into the Roman provincial system as the province of Asia, marking the endpoint of the Attalid state as an independent polity.
On Attalus III’s death, he left his kingdom to the Roman Republic, initiating a contested transition from Attalid monarchy to Roman control in Asia Minor.
Aristonicus (Eumenes III) claimed the Pergamene throne and fought Rome and its allies; the conflict (traditionally dated 133/132–129 BCE) determined how and when Rome would convert Attalid lands into a province.
Attalus III took the throne as the last Attalid ruler; his reign ended the dynasty’s direct control, as Pergamon’s fate became intertwined with Roman expansion.
Attalus II Philadelphus became king after Eumenes II’s death and maintained the dynasty’s close alignment with Rome while continuing urban foundations and regional diplomacy.
Under Eumenes II, Pergamon sponsored monumental building and sculptural programs; modern scholarship commonly places the Great Altar’s construction in the mid-2nd century BCE, tied to royal ideology and victory commemoration.
The Treaty of Apamea ended the Roman–Seleucid War and forced Antiochus III to cede Asia Minor territories west of the Taurus; much of the transferred land was organized under Rome’s allies, prominently including Pergamon.
In the decisive battle against Antiochus III, Roman forces allied with Eumenes II defeated the Seleucid army near Magnesia, paving the way for a postwar settlement favorable to Pergamon.
After Attalus I’s death, Eumenes II succeeded to the throne and pursued a pro-Roman foreign policy that helped elevate Pergamon to its greatest territorial and cultural prominence.
Following victories over the Galatians, Attalus I took the title basileus (king) and the epithet Soter (“Savior”), formalizing Pergamon’s status as a Hellenistic monarchy.
Attalus I defeated a coalition involving Seleucid forces led by Antiochus Hierax and allied Galatians at Aphrodisium, strengthening Pergamon’s position in western Anatolia.
Early in his reign, Attalus I won a decisive victory over Galatian forces near the sources of the Caecus (Kaikos) River—an event he used to bolster legitimacy and prestige.
Eumenes I died and was succeeded by Attalus I, who would transform Pergamon from a dynast’s realm into an openly royal kingdom with broader regional ambitions.
Soon after taking power, Eumenes I defeated Seleucid forces under Antiochus I near Sardis, helping establish Pergamon as an independent city-state rather than a Seleucid dependency.
Philetaerus died without heirs; his adopted nephew Eumenes I became dynast of Pergamon, continuing the Attalid line and shifting toward more assertive independence.
Philetaerus, originally a commander under Lysimachus, established himself as the effective ruler at Pergamon—an origin point for what would become Attalid power in northwest Asia Minor.
Attalid Pergamon and the Attalid Dynasty (282–129 BCE)
