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Leiden University was Pieter Zeeman's alma mater. This Dutch physicist, born in 1865, enrolled at Leiden University to pursue his higher education. During his time there, he conducted groundbreaking research on the Zeeman effect, which earned him the Nobel Prize in Physics in 1902, shared with his colleague Hendrik Lorentz. Zeeman's contributions to physics, particularly in the field of spectroscopy, cemented his legacy as a distinguished alumnus of Leiden University.