The Guildhall Library is a public reference library specialising in subjects relevant to London. It is administered by the Corporation of London, the government of the City of London, which is the historical heart of London, England.
The library was founded in the 1420s under the terms of the will of Lord Mayor Dick Whittington. Many volumes in store rooms were lost due to bombing in World War Two. The library was originally housed in the Old Library at the Guildhall, and moved to modern premises elsewhere in the Guildhall complex in the 1970s.