History

• Guildhall Library
• London Metropolitan Archives
• Museum of London
• British History Online - digitised versions of many old documents including surveys, chronicles and diaries; maps and plans; legal, church, livery company, customs and taxation records
• Charles Booth's London - Booth's poverty maps and notebooks in digitised and searchable format
• Collage: The London Picture Archive - images from London Metropolitan Archives and Guildhall Library
• A Dictionary of London by Henry Harben (1918)
• Dictionary of Victorian London
• Exploring 20th Century London - a joint project by London museums exploring objects in their collections through articles and audio slideshows
• Georgian London - blog by Lucy Inglis
• Guildhall Historical Association
• The History of London - an expanding collection of articles by Londoner Peter Stone
• Inns of Court on Wikipedia
• Locating London's Past - resources related to early modern and 18th-century London with interactive version of John Rocque's 1746 London map
• London Historians - see also their Facebook group
• London History Group - listings of historical London sites; see also their Facebook group
• London Lives - searchable database of 18th-century manuscripts
• London Memorials - 'aiming to capture all memorials in London'
• London Shh... - small historic houses
• Old Bailey Online - proceedings of the Old Bailey plus much background material
• Panorama of the Thames - project to create a panoramic record of London's riverside through the centuries
• Shakespearean London Theatres
• John Stow, A Survey of London - full text of the 1603 edition
• John Strype, A Survey of the Cities of London and Westminster - full text of Strype's 1720 updated and expanded version of Stow

Videos

• Roman Temple in the City - 1954 British Pathé news of discovery of Temple of Mithras
• Conserving the head of Mithras - 1954 British Pathé film
• 'Fly-through' of 17th-century London before the Great Fire
• Barbican - 1969 film (22min 26sec) about the development and building of the Barbican

Books
(op) = out of print

• Ben Weinreb, Christopher Hibbert, Julia Keay, John Keay (eds), The London Encyclopaedia (Macmillan, 3rd revised edition, 2010, op; look out for secondhand copies, including older editions)
• Peter Ackroyd, London: The Biography (Chatto & Windus, 2000)
• Rob Baker, Beautiful Idiots and Brilliant Lunatics (Amberley Publishing, 2015)
• Felix Barker and Peter Jackson, London: 2000 Years of a City & Its People (Papermac, 1983, op)
• Hugh Clout (ed), The Times History of London (Times Books, 1999, op)
• Neil Hanson, The Dreadful Judgement: The True Story of the Great Fire of London (Corgi, paperback, 2012)
• Leo Hollis, The Phoenix: The Men Who Made Modern London (Phoenix, 2009) - the rebirth of London after the Great Fire
• Gustav Milne, The Great Fire of London (Historical Publications Ltd, 1990)
• Gustav Milne, The Port of Medieval London (Tempus Publishing, 2003)
• John Morris, Londinium: London in the Roman Empire (originally published 1982; Phoenix, new edition, 1999, op)
• Patricia Pierce, Old London Bridge (Headline, 2002)
• Stephen Porter, The Great Plague of London (Amberley Publishing, revised edition, 2012)
• John Schofield, The Building of London: From the Conquest to the Great Fire (Sutton Publishing, 3rd revised edition, 1999, op)
• Roy Porter, London: A Social History (Penguin, new edition, 2000)
• Fiona Rule, London's Docklands: A History of the Lost Quarter (Ian Allan Publishing, 2009)
• Jerry White, London in the 18th Century: A Great and Monstrous Thing (Vintage, paperback, 2013)
• Jerry White, London in the 19th Century: 'A Human Awful Wonder of God' (Vintage, paperback, 2008)
• Jerry White, London in the 20th Century: A City and Its People (Vintage, paperback, 2008)

Archaeology

• City of London Archaeological Society
• Crossrail archaeology programme
• London Archaeologist - quarterly magazine
• London and Middlesex Archaeological Society
• Museum of London Archaeology
• Thames Discovery Programme
• Walbrook Discovery Programme
• Chris Thomas (ed), London's Archaeological Secrets: A World City Revealed (Museum of London, 2003)