Attalus II Philadelphus

Attalus II "Brother-Loving"
King of Pergamon
Statue of Attaus II
Reign	159-138 BC
Predecessor	Eumenes II
Successor	Attalus III
Born	220 BC Kingdom of Pergamon
Died	138 BC Pergamom
Consort	Stratonice
Greek	Εὐμένης
House	Attalid dynasty
Father	Attalus I
Mother	Apollonis
Religion	Greek Polytheism

Attalus II Philadelphus (Greek: Ἄτταλος Β΄ ὁ Φιλάδελφος, Attalos II Philadelphos, which means "Attalus the brother-loving"; 220–138 BC) was a King of Pergamon and the founder of modern-day Turkish city Antalya.

He was the second son of Attalus I Soter and queen Apollonis of Cyzicus, and ascended the throne first as co-ruler alongside his ailing brother Eumenes II in 160 BC, whose widow Stratonice of Pergamon he married in 158 BC upon Eumenes' death.

Prior to becoming king, Attalus was already an accomplished military commander. In 192 BC he was sent by his brother Eumenes to Rome to warn against Antiochus III. In 190 BC, he was present in the Battle of Magnesia which resulted in a defeat against the Seleucids. In following years, in around 189 BC led his forces to fight alongside the Roman Army under Gnaeus Manlius Vulso in Galatia. From 182-179 BC, he successfully defeated the Kingdom of Pontus under Pharnaces I, gaining some territory. In 172, Eumenes, returning from a visit to Rome, is attacked near Cirrha and is believed to be dead. Attalus, upon learning of this, marries his brother's widow Stratonice and becomes king of Pergamon. When his brother returns, he divorces Stratonice and cedes the power to his elder brother without a fight.

Attalus II also made frequent diplomatic visits to Rome, and sent frequent envoys such as Andronicus of Pergamum, gaining the esteem of the Romans. At one point, they offered him assistance to overthrow his brother, but he declined. When his brother died in 159 BC, his nephew was too young to rule at the time, so he ascended the throne as regent and married Stratonice once again. The Romans had assisted him in his own battles against Prusias II in 156–154 BC. In the summer of 152, he, Ptolemy IV, Ariarathes V, and Rome, help pretender Alexander Balas to seize the Seleucid throne from Demetrius I and in 149 BC, he helped Nicomedes II Epiphanes seize the Bithynian throne from his father Prusias II.