The Paris Métro or Métropolitain (French: Métro de Paris) is the rapid transit metro system in Paris. It is a symbol of the city, notable for its station architecture, influenced by Art Nouveau. It has 16 lines, mostly underground, and a total length of 214 km (133 mi). There are 300 stations. Since some are served by several lines, there are 384 stops in total.
Paris has the most closely spaced subway stations in the world, with 245 stations within the 105 km2 (41 sq mi) City of Paris. Lines are numbered 1 to 14, with two minor lines, 3bis and 7bis. The minor lines were originally part of lines 3 and 7 but became independent.
Lines are identified on maps by number and colour. Direction of travel is shown by the terminus station.Paris is the second busiest metro system in Europe after Moscow. It carries 4.5 million passengers a day, and an annual total of 1.388 billion (2007). Châtelet-Les Halles, with 5 Métro lines and three RER commuter rail lines, is the world's largest underground station.