She survived two murderous husbands, married her own brother, won chariot races at the Olympics, and was worshipped as a goddess — while still alive.
Arsinoë II (c. 316–268 BC) was the daughter of Ptolemy I of Egypt. At roughly 15 years old, she was married off to King Lysimachus of Thrace — a man of about 60. She bore him three sons and became his most powerful queen, but his court was a nest of assassination plots she would need to navigate for her survival.
When Lysimachus died in battle, Arsinoë made a calculated marriage to her half-brother Ptolemy Keraunos, believing it would protect her sons' claim to power. Instead, he murdered two of her sons. She escaped with her remaining child and fled to Egypt.
In Egypt, Arsinoë married her full brother, Pharaoh Ptolemy II — a practice that was unusual even for the Hellenistic world, though it aligned with ancient Egyptian royal traditions. Both received the epithet 'Philadelphoi,' meaning 'sibling-lovers.' Rather than being a symbolic figurehead, she governed alongside her brother and played an active role in military and religious affairs.
Arsinoë II was celebrated throughout the Greek world in her own lifetime. She reportedly won three chariot races at the Olympic Games around 272 BC — a rare honor, and one of the few women in the ancient world to have Olympic victories recorded in her name.
When she died around 268 BC, Ptolemy II declared her a goddess and established an official cult in her honor across Egypt and beyond. Shrines were built, coins bore her image, and a new city — Arsinoë — was named after her. She became one of the most powerful and celebrated queens of the ancient world, setting the template for the Ptolemaic queens who came after her, including Cleopatra VII.