In 2004, the downtown network of the underground city was re-branded and given the name RÉSO, which is a homophone of the French word "réseau", or network. The "O" at the end of the word is the logo of the Montreal Metro. Schematic maps bearing the RÉSO logo are found throughout the network. The largest and best-known segment is located in the centre of downtown, delimited by the Peel and Place-des-Arts Metro stations on the Green Line and the Lucien-L'Allier and Place-d'Armes stations on the Orange Line.