 Poincaré married Louise Poulain d’Andecy on April 20, 1881 and soon thereafter joined the faculty of sciences at the University of Paris. In 1886 he succeeded G. Lippmann in the chair of mathematical physics and probability. In 1896 he was given the chair of mathematical astronomy and celestial mechanics, in 1902 he was named professor of theoretical electricity at the Bureau de Poste et Télégraph and in 1904 professor of general astronomy at the École Polytechnique. Poincaré also worked at the French Bureau des Longitudes from 1893 (Galison 2003).