The London and Middlesex Archaeological Society (LAMAS) is a society founded in 1855 for the study of the archaeology and local history of the City of London and the historic county of Middlesex. It also takes some interest in districts that were historically in Surrey, Kent, Essex and Hertfordshire, but that now lie within Greater London. The Society receives support from the Museum of London, and works in close association with the Museum and with Museum of London Archaeology. It acts to some extent as an umbrella organisation to support smaller archaeological and local history societies in the Greater London area, and hosts an Annual Conference of London Archaeologists and an annual Local History Conference.
The Society was established in 1855 "for the purpose of investigating the antiquities and early history of the Cities of London and Westminster and the Metropolitan County of Middlesex". The inaugural meeting was held on 14 December 1855 at Crosby Hall, Bishopsgate. The primary instigators were George Bish Webb (who was already honorary secretary of Surrey Archaeological Society, established the previous year, and who became the first honorary secretary of LAMAS); and Rev. Thomas Hugo, curate of St Botolph-without-Bishopsgate (who became the first chairman of LAMAS). Other founder members included Charles Boutell, Henry Christmas, George Gilbert Scott, and Charles Roach Smith. Boutell served as honorary secretary from 23 July to 27 November 1857, but was dismissed for what was termed "improper" bookkeeping involving the disappearance of £56 15s received in subscription fees. Also active in the early decades were John Gough Nichols and Edward Brabrook (the latter eventually serving as President from 1910 to 1930).Sir Thomas Phillipps was an early supporter of the Society, but allegedly withdrew on learning that Hugo had expressed a wish to see the restoration of the monasteries.