Imperial War Museum

Wikipedia contributors · CC BY-SA · EN · 04/10/2026

The Imperial War Museum (IWM), currently branded "Imperial War Museums", is a British national museum. Its headquarters are in London, with five branches in England. Founded as the Imperial War Museum in 1917, it was intended to record the civil and military war effort and sacrifice of the United Kingdom and its Empire during the First World War. The museum's remit has since expanded to include all conflicts in which British or Commonwealth forces have been involved since 1914. As of 2012, the museum aims "to provide for, and to encourage, the study and understanding of the history of modern war and 'wartime experience'."

Originally housed in the Crystal Palace at Sydenham Hill, the museum opened to the public in 1920. In 1924, it moved to space in the Imperial Institute in South Kensington and in 1936 it acquired a permanent home at the former Bethlem Royal Hospital in Southwark, which serves as its headquarters. The outbreak of the Second World War saw the museum expand both its collections and its terms of reference, but in the post-war period it entered a period of decline. In 1976 the museum opened IWM Duxford at Duxford airfield in Cambridgeshire, and in 1978 the Royal Navy cruiser HMS Belfast, which is permanently berthed on the River Thames in central London, became a branch of the museum. In 1984, Churchill War Rooms, an underground wartime command centre in Westminster, were opened to the public. In 2002 IWM North opened in Trafford, Greater Manchester, the fifth branch of the museum and the first in the north of England. From the 1980s onwards, the museum's Southwark building underwent a series of multimillion-pound redevelopments, the latest of which was completed in 2022.

The museum's collections include archives of personal and official documents, photographs, film and video material, and oral history recordings, an extensive library, a large art collection, and examples of military vehicles and aircraft, equipment, and other artefacts.

The museum is funded by government grants, charitable donations, and revenue generation through commercial activity such as retailing, licensing, and publishing. General admission is free to IWM London (although specific exhibitions require the purchase of a ticket) and IWM North, but an admission fee is levied at the other branches. The museum is an exempt charity under the Charities Act 1993 and a non-departmental public body under the Department for Culture, Media and Sport. As of April 2024, the chairman of the trustees is Guy Weston. Since May 2023, Caro Howell has served as the museum's director-general.

History of the museum

Establishment: 1917–1921

On 27 February 1917 Sir Alfred Mond, a Liberal MP and First Commissioner of Works, wrote to the Prime Minister David Lloyd George to propose the establishment of a National War Museum. This proposal was accepted by the War Cabinet on 5 March 1917 and the decision announced in The Times on 26 March. A committee was established, chaired by Mond, to oversee the collection of material to be exhibited in the new museum.

This National War Museum Committee set about collecting material to illustrate Britain's war effort by dividing into subcommittees examining such subjects as the Army, the Navy, the production of munitions, and women's war work. There was an early appreciation of the need for exhibits to reflect personal experience in order to prevent the collections becoming dead relics. Sir Martin Conway, the museum's first director-general, said that exhibits must "be vitalised by contributions expressive of the action, the experiences, the valour and the endurance of individuals". The museum's first curator and secretary was Charles ffoulkes, who had previously been curator of the Royal Armouries at the Tower of London. In July 1917 Mond made a visit to the Western Front in order to study how best to organise the museum's growing collection. While in France he met French government ministers, along with Field Marshal Sir Douglas Haig, Commander-in-Chief (C-in-C) of the British Expeditionary Force (BEF) on the Western Front, who reportedly took great interest in his work. In December 1917 the name was changed to the Imperial War Museum after a resolution from the India and Dominions Committee of the museum.

The museum was opened by King George V at the Crystal Palace on 9 June 1920. During the opening ceremony, Sir Alfred Mond addressed the King on behalf of the committee, saying that "it was hoped to make the museum so complete that every one who took part in the war, however obscurely, would find therein an example or illustration of the sacrifice he or she made" and that the museum "was not a monument of military glory, but a record of toil and sacrifice". Shortly afterwards the (10 & 11 Geo. 5. c. 16) was passed and established a board of trustees to oversee the governance of the museum. To reflect the museum's Imperial remit the board included appointees of the governments of India, South Africa, Canada, Australia and New Zealand. While the act was being debated, some parliamentarians felt that the museum would perpetuate an undesirable war spirit and Lieutenant-Commander Joseph Kenworthy MP said that he would "refuse to vote a penny of public money to commemorate such suicidal madness of civilisation as that which was shown in the late War". On the August Bank Holiday 1920, the first public holiday since the museum's opening, 94,179 visitors were received, and by November 1921, 2,290,719 had visited the museum.

Relocation 1924–1936

In 1924 the museum moved to the Imperial Institute building (demolished in the 1950s and 1960s to make way for Imperial College) in South Kensington. While this location was more central and in a prestigious area for museums, the accommodation itself proved cramped and inadequate and in 1936 a new permanent location was found south of the River Thames in Southwark. The building, designed by James Lewis was the former Bethlem Royal Hospital which had been vacated following the hospital's relocation to Beckenham in Kent. The site was owned by Lord Rothermere, who had originally intended to demolish the building to provide a public park in what was a severely overcrowded area of London. Eventually the central portion of the hospital building was retained.

The two extensive wings were removed and the resulting space named Geraldine Mary Harmsworth Park, after Lord Rothermere's mother. Sir Martin Conway described the building as "...a fine building, really quite noble building, with a great portico, a distinguishing dome, and two great wings added to it for the accommodation of lunatics no longer required. This particular building can be made to contain our collection admirably, and we shall preserve from destruction quite a fine building which otherwise will disappear". The "distinguishing dome" was added by Sydney Smirke in 1846 and housed the hospital's chapel. The museum was reopened by the Duke of York (later King George VI) in its new accommodation on 7 July 1936.

Second World War and after: 1939–1966

With the outbreak of the Second World War in 1939, the museum began to collect material documenting the conflict. In November 1939, during the "Phoney War", the museum appeared in the opening sequence of the GPO Film Unit production The First Days, in which children are seen playing on some of the museum's German artillery pieces captured during the First World War. With the Dunkirk evacuation in May–June 1940, the British Army's shortage of equipment saw eighteen of the museum's artillery pieces return to military service. The museum's trench clubs were used by the Home Guard, while other items such as sights and optical instruments were returned to the Ministry of Supply. The museum refused to return some historic items such as a naval gun from HMS Lance (which had fired Britain's first shot of the First World War) or a gun served by Victoria Cross-winning boy seaman Jack Cornwell. The museum was closed for the duration of the war in September 1940 with the onset of the Blitz. On 31 January 1941 the museum was struck by a Luftwaffe bomb which fell on the naval gallery. A number of ship models were damaged by the blast and a Short Type 184 seaplane, which had flown at the Battle of Jutland, was destroyed. While closed to the public the museum's building was used for a variety of purposes connected to the war effort, such as a repair garage for government motor vehicles, a centre for Air Raid Precautions civil defence lectures and a fire fighting training school.

In October 1945 the museum mounted a temporary exhibition, the first since the end of the war in August, which showcased technologies developed by the Petroleum Warfare Department. These included the submarine fuel pipeline PLUTO, the fog dispersal method FIDO, and flame weapons such as the Churchill Crocodile and Wasp Universal Carrier. Due to bomb damage to the building and exhibits, the museum was obliged to reopen its galleries piecemeal and opened a portion of its galleries in November 1946. A third of the galleries were opened in 1948 and a further wing opened in 1949. In 1953, with Commonwealth forces engaged in Korea and Malaya the museum began its current policy of collecting material from all modern conflicts in which British or Commonwealth forces were involved. Despite this expansion of remit, the early postwar period was a period of decline for the museum. Noble Frankland, the museum's director from 1960 to 1982, described the museum's galleries in 1955 as appearing "dingy and neglected [and in a] dismal state of decay" the museum's "numerous stunning exhibits" notwithstanding.

Redevelopment and expansion: 1966–2012

In 1966 the museum's Southwark building was extended to provide collections storage and other facilities, the first major expansion since the museum had moved to the site. The development also included a purpose-built cinema. In 1967 the museum acquired a pair of 15-inch naval guns. One had been mounted on the Royal Navy's HMS Ramillies and the other on both HMS Resolution and HMS Roberts. Both had been fired in action during the Second World War. They went on permanent display outside the museum in May 1968. The acquisition of these guns, representative of the dreadnought era of British battleships, led the museum to seek to acquire a 6-inch triple turret that would be representative of a number of classes of British cruisers. This would eventually lead to the preservation of the Royal Navy light cruiser HMS Belfast, which became a branch of the museum in 1978.

Later in 1968 on 13 October the museum was attacked by an arsonist, Timothy John Daly, who claimed he was acting in protest against the exhibition of militarism to children. He caused damage valued at approximately £200,000, not counting the loss of irreplaceable books and documents. On his conviction in 1969 he was sentenced to four years in prison.

In 1969 RAF Duxford, a Royal Air Force fighter airfield in Cambridgeshire was declared surplus to requirements by the Ministry of Defence. Needing further space, the museum duly requested permission to use part of the site as temporary storage. The entire site was later transferred to the museum in February 1976 and Duxford, now referred to as Imperial War Museum Duxford became the museum's first branch. Also during the 1970s the government raised the possibility of the museum taking over the historic Cabinet War Rooms in Whitehall. The museum was reluctant due to its new commitments related to Duxford and HMS Belfast, but agreed in 1982.

By 1983 the museum was again looking to redevelop the Southwark site and approached engineering firm Arup to plan a phased programme of works that would expand the building's exhibition space, provide appropriate environmental controls to protect collections, and improve facilities for visitors. The following year, in April 1984, the Cabinet War Rooms were opened to the public as a branch of the museum.

The first phase of the works to the Southwark building started in 1986 and were completed in 1989, during which time the museum was closed to the public. The work included the conversion of what was previously the hospital's courtyard into a centrepiece Large Exhibits Gallery. This gallery featured a strengthened ground floor (to support the weight of very heavy exhibits), a first floor mezzanine and second storey viewing balcony. Into this space were placed tanks, artillery pieces, vehicles, ordnance and aircraft from the First World War to the Falklands War. For some years the museum was marketed as "The new Imperial War Museum". This atrium, with its concentration of military hardware, has been described as "the biggest boys' bedroom in London". This first phase cost £16.7 million (of which £12 million was provided by the government) and the museum was reopened by The Queen on 29 June 1989. In 1990, the museum was awarded National Heritage Museum of the Year.

In September 1992 the museum was the target of a Provisional Irish Republican Army attack against London tourist attractions. Two incendiary devices were found in a basement gallery, but were extinguished by staff before the arrival of the fire brigade, and caused only minor damage.

Source and attribution

Adapted from “Imperial War Museum” by English Wikipedia contributors. Main paragraphs and sections are retained; tables, reference markers and technical markup are omitted. This is an encyclopedic adaptation, not a personal review. Original revision and contributor history ↗. Text is shared under CC BY-SA 4.0 ↗. Check current visitor access, tickets and transport with the relevant operator.