L'Enfant Plaza is a Washington Metro station in Washington, D.C. served by the Blue, Green, Orange, and Yellow Lines. It is a transfer station with the Blue and Orange lines on the lower level, crossed by the Yellow and Green lines on the upper level. It is also where the Yellow and Green lines converge going north. It is the only station in the system to be served by four lines; when the Silver Line begins service in 2011, it will be the only station in the system to be served by five lines. L'Enfant Plaza is named for the French architect of the Federal District, Pierre Charles L'Enfant.