Hypatia of Alexandria: The Woman Who Knew Too Much

In March 415 AD, a woman was pulled from her chariot on the streets of Alexandria and murdered by a mob.

Hypatia was the daughter of Theon of Alexandria. Most accounts of her life start there and, frankly, don't get much further. Theon spent his career editing Euclid and correcting the astronomical tables of his day, the kind of work that keeps the lights on in mathematics without anyone particularly noticing. Theon was independently significant, but Hypatia's reputation has done his no harm. The distinction matters. She worked on Diophantus's algebra and Apollonius's conic sections, and what she produced appears to have gone beyond summary, though the evidence is frustratingly incomplete.

It is less convenient as a symbol than her death, which is probably why nobody talks about it.

She was also, unusually, a public intellectual. She wore the philosopher's cloak and lectured openly, which in a Roman province in the early fifth century was not a neutral act for a woman. She moved publicly through the city, and ancient sources describe her travelling by chariot, which in context was not a neutral image. Her students came from across the empire, Christian and pagan alike, which in fifth century Alexandria was a more complicated arrangement than it sounds. Synesius of Cyrene is the one we know most about, mainly because he kept writing to her long after he left. He became a bishop eventually. His letters to Hypatia read less like a former student's gratitude and more like genuine intellectual dependence.

Alexandria in the early fifth century was not a good city to be conspicuous in. Nobody was really in charge, which suited some people considerably better than others. Orestes, the Roman prefect, was trying to maintain civil order in a place that had more competing factions than it could manage. Cyril had recently been appointed Bishop and was moving fast. Socrates Scholasticus reports that he expelled the Jewish community from Alexandria, consolidated religious authority, and made clear he was not interested in rivals. Hypatia advised Orestes. Her association with him was, by most accounts, a significant factor in what followed.

The murder was carried out by a mob often identified as the parabalani, a group that modern historians tend to describe as a Christian paramilitary organisation, nominally set up around hospital work. They pulled her from her chariot, dragged her to the Caesareum, and killed her. The ancient sources are vague on the method, which is either an oversight or a deliberate one. Roof tiles or potsherds, depending on which account you read. Her remains were burned. Whatever the centuries since have made of it, this is best understood not primarily as a confrontation between science and religion. It was a power struggle in a failing provincial city, and Hypatia was caught in the middle of it.

Almost none of her actual writing survives. What we have are her father's texts, which later tradition often credits her with improving, and the letters of Synesius. The void has been filled repeatedly by whoever needed her most. The Enlightenment made her a martyr for reason. The nineteenth century turned her into a romantic heroine. Twentieth century feminism recovered her as an erased genius. None of these versions are entirely dishonest, but none of them are particularly interested in Hypatia either. They are about the people doing the reading.

The actual woman, what she thought, what she was working on, what she made of the city disintegrating around her, is almost entirely out of reach. That is the real loss. It is less convenient as a symbol than her death, which is probably why nobody talks about it.