On September 24, 1893, Alexander Markowitsch Ostrowski was born. He was a Ukrainian mathematician known for his work in algebra and number theory, and he became a Professor of Mathematics at the University of Basel in 1928, teaching there until his retirement in 1958. See wikipedia for more information.

On September 24, 1541, Paracelsus died. He was a Swiss physician, alchemist, and philosopher who studied and taught in Basel, and he was central to early modern medicine through his combination of empirical observation and chemical approaches. See wikipedia for more information.