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Events on Thursday 19 July 1900 1
1900Paris Métro opensFirst line of the Paris underground railway begins serviceLine 1 of the Paris Métro opened between Porte Maillot and Porte de Vincennes to coincide with the World's Fair. The system used a distinctive design of cast-iron station entrances by Hector Guimard. It grew into one of the busiest metro networks in the world.