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Ptolemy II Philadelphus

King of the Ptolemaic Kingdom, 284–246 BC

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During Ptolemy II's reign, the material and literary splendour of the Alexandrian court was at its height. He promoted the Museum and Library of Alexandria. In addition to Egypt, Ptolemy's empire encompassed much of the Aegean and Levant. He pursued an aggressive and expansionist foreign policy with mixed success. From 275 to 271 BC, he led the Ptolemaic Kingdom against the rival Seleucid Empire in the First Syrian War and extended Ptolemaic power into Cilicia and Caria, but lost control of Cyrenaica after the defection of his half-brother Magas. In the Chremonidean War (c. 267–261 BC), Ptolemy confronted Antigonid Macedonia for control of the Aegean and suffered serious setbacks. This was followed by a Second Syrian War (260–253 BC) against the Seleucid empire, in which many of the gains from the first war were lost.

Early life

Ptolemy II was the son of Ptolemy I and his third wife, Berenice I. He was born on the island of Kos in 309/308 BC, during his father's invasion of the Aegean in the Fourth Diadoch War. He had two full sisters, Arsinoe II and Philotera. Ptolemy was educated by a number of the most distinguished intellectuals of the age, including Philitas of Cos and Strato of Lampsacus.

Ptolemy II had numerous half-siblings. Two of his father's sons by his previous marriage to Eurydice, Ptolemy Keraunos and Meleager, became kings of Macedonia. The children by his mother Berenice's first marriage to Philip included Magas of Cyrene and Antigone, the wife of Pyrrhus of Epirus.

At Ptolemy II's birth, his older half-brother Ptolemy Keraunos was the heir presumptive. As Ptolemy II grew older a struggle for the succession developed between them, which culminated in Ptolemy Keraunos' departure from Egypt around 287 BC. On 28 March 284 BC, Ptolemy I had Ptolemy II declared king, formally elevating him to the status of co-regent.

In contemporary documents, Ptolemy is usually referred to as "King Ptolemy son of Ptolemy" to distinguish him from his father. The co-regency between Ptolemy II and his father continued until the latter's death in April–June 282 BC. One ancient account claims that Ptolemy II murdered his father, but other sources say that he died of old age, which is more likely given that he was in his mid-eighties.

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