Index to London Underground HistoryPeriod Main event(s)
-1859 The first tunnels under the Thames
1860-1869 The first two companies opened their lines, Metropolitan and Metropolitan District
1870-1879 The first (unsuccessful) tube: The Tower Subway
1880-1889 Metropolitan and Metropolitan District extensions out to the NW and SW suburbs, respectively
1890-1899 The first (successful and/or electric) tube: City & South London Railway
Waterloo & City opened
1900-1909 Five lines opened: Central, Northern City, Bakerloo, Piccadilly and Charing Cross Euston & Hampstead, now part of Northern
1910-1919 Bakerloo reached Watford
East London line as we know it today opened
1920-1929 Northern line extensions
1930-1939 Piccadilly line extensions
1940-1949 Central line extensions
1950-1959 Not much ha