The station opened on 15 March 1899 as the London terminus of the Great Central Main Line (GCML), the last major railway to open in Britain for 100 years, linking the capital to the cities of Leicester, Sheffield and Manchester. Marylebone was the last of London's main line termini to be built and is one of the smallest, opening with half of the platforms originally planned. There has been an interchange with the Bakerloo line since 1907, but not with any other lines.