Paris Métro Opens Its First Line
CONFIRMADO85% DE CONFIANZARATP's[3] own history page and EarthSky's[2] science-history article both give 19 July 1900 as the inauguration date of the first métro line.
The Paris Métro's first line opened to the public on 19 July 1900, running between Porte Maillot and Château de Vincennes.
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