Hypatia. Painted by Julius Kronberg (1850–1921) in 1889. Oil on canvas. Hypatia (c. 350/370 - 415 AD) was the daughter of Theon, a mathematician in Alexandria, Egypt. She became a prominent mathematician, astronomer, and Neoplatonist philosopher and teacher. She made improvements to astronomical instruments and worked on scientific commentaries. She was murdered by a Christian mob.