The traffic figure is 91.6 million journey per year, although this also includes the traffic on Line 3bis making it the tenth busiest line on the network.
October 10, 1904: The first portion of line 3 was opened between Père Lachaise cemetery and Villiers. Work took longer than expected because of existing infrastructure.
January 25, 1905: The line was extended in the east from Père Lachaise to Gambetta.
May 23, 1910: The line was extended westbound from Villiers to Pereire.
February 15, 1911: The line was extended from Pereire to Porte de Champerret.
November 27, 1921: The line was extended eastbound from Gambetta to Porte des Lilas.
September 24, 1937: The line was extended from Porte de Champerret to Pont de Levallois.
1967: Line 3 was the first metro line to receive new MF67 rolling stock. It still uses this stock which has been recently renovated.
August 23, 1969: Gambetta station is remodelled, absorbing nearby Martin Nadaud station.
March 23, 1971: The branch between Gambetta and Porte des Lilas was separated from the line to become the independent Line 3bis.
April 2, 1971: The line was extended from Gambetta to Gallieni.
October 15, 1907: Rue St-Denis renamed Réaumur-Sébastopol.
1926: Caumartin renamed Havre-Caumartin
May 1, 1946: Vallier renamed Louise Michel in honour of the leader of the "La Commune".
September 1998: Saint-Maur is renamed Rue Saint-Maur in order to avoid confusion with the suburb of Saint-Maur-les-Fossées.
Facts
Due to connections with other adjacent stations, it is possible to walk between three stations on the line without heading to the surface. This is done by starting at Saint-Lazare (Métro 3, 12, 13 and 14), then transferring to Hausmann Saint-Lazare station (RER E), from there going to Havre - Caumartin (Métro 3 and 9) then connecting to Auber (RER A) and finally walking from there to Opéra (Métro 3, 7 and 8). The journey can also be made the other way round (Opéra to Saint-Lazare)
Map
Geographically accurate path of Paris Métro Line 3.