Ernest Esclangon
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Ernest Benjamin Esclangon was a French astronomer and mathematician.
Ernest Esclangon, by Paul Helbronner, 1930.
Paris Observatory
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The Paris Observatory, a research institution of the Paris Sciences et Lettres University, is the foremost astronomical observatory of France, one of the largest astronomical centres in the world, and
The Château-Neuf at Meudon in 1871, after the fire
Project for a dome in the heart of the Château-Neuf, never built. Circa 1880
The Meridian Room (or Cassini Room) at the Paris Observatory. The Paris Meridian is traced on the floor.