Claude Gay, often named Claudio Gay in Spanish texts, (18 March 1800 – 29 November 1873), was a French botanist, naturalist and illustrator. This explorer carried out some of the first investigations about Chilean flora, fauna, geology and geography. The ''Cordillera Claudio Gay'' in the Atacama Region of Chile is named after him. He founded the Chilean National Museum of Natural History, its first director was another Frenchman Jean-François Dauxion-Lavaysse.
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