New Building

New century, new building (1900–25)

Opening of The White Wing, King Edward VII's Galleries (1914)

By the last years of the 19th century, The British Museum's collections had increased so much that the Museum building was no longer big enough for them. In 1895 the trustees purchased the 69 houses surrounding the Museum with the intention of demolishing them and building around the West, North and East sides of the Museum. The first stage was the construction of the northern wing beginning 1906.
All the while, the collections kept growing. Emily Torday collected in Central Africa, Aurel Stein in Central Asia, D.G. Hogarth, Leonard Woolley and T. E. Lawrence excavated at Carchemish. In 1918, because of the threat of wartime bombing, some objects were evacuated to a Postal Tube Railway at Holborn, the National Library of Wales (Aberystwyth) and a country house near Malvern. On the return of antiquities from wartime storage in 1919 some objects were found to have deteriorated. A temporary conservation laboratory was set up in May 1920 and became a permanent department in 1931. It is today the oldest in continuous existence. In 1923 the British Museum welcomed over one million visitors
 

Disruption and reconstruction (1925–50)

Sir Leonard Woolley holding the famous excavated Sumerian Queen's Lyre, (1922

New mezzanine floors were constructed and book stacks rebuilt in an attempt to cope with the flood of books. In 1931 the art dealer Sir Joseph Duveen offered funds to build a gallery for the Parthenon sculptures. Designed by the American architect John Russell Pope, it was completed in 1938. The appearance of the exhibition galleries began to change as dark Victorian reds gave way to modern pastel shades. However, in August 1939, due to the imminence of war and the likelihood of air-raids the Parthenon Sculptures along with Museum's most valued collections were dispersed to secure basements, country houses, Aldwych tube station, the National Library of Wales and a quarry. The evacuation was timely, for in 1940 the Duveen Gallery was severely damaged by bombing^. The Museum continued to collect from all countries and all centuries: among the most spectacular additions were the 2600 BC Mesopotamian treasure from Ur, discovered during Leonard Woolley's 1922–34 excavations. Gold, silver and garnet grave goods from the Anglo-Saxon ship burial at Sutton Hoo (1939) and late Roman silver tableware from Mildenhall, Suffolk (1946). The immediate post-war years were taken up with the return of the collections from protection and the restoration of the museum after the blitz. Work also began on restoring the damaged Duveen Gallery.

A new public face (1950–75)

The re-opened Duveen Gallery, (1980)

In 1953 the Museum celebrated its bicentenary. Many changes followed: the first full time in house designer and publications officer were appointed in 1964, A Friends organization was set up in 1968, an Education Service established in 1970 and publishing house in 1973. In 1963 a new Act of Parliament introduced administrative reforms. It became easier to lend objects, the constitution of the Board of Trustees changed and the Natural History Museum became fully independent. By 1959 the Coins and Medals office suite, completely destroyed during the war, was rebuilt and re-opened, attention turned towards the gallery work with new tastes in design leading to the remodelling of Robert Smirke's Classical and Near Eastern galleries. In 1962 the Duveen Gallery was finally restored and the Parthenon Sculptures were moved back into it, once again at the heart of the museum.
By the 1970s the Museum was again expanding. More services for the public were introduced; visitor numbers soared, with the temporary exhibition "Treasures of Tutankhamun" in 1972, attracting 1,694,117 visitors, the most successful in British history. In the same year the Act of Parliament establishing the British Library was passed, separating the collection of manuscripts and printed books from the British Museum. This left the Museum with antiquities; coins, medals and paper money; prints & drawings; and ethnography. A pressing problem was finding space for additions to the library which now required an extra 1 1/4 miles of shelving each year. The Government suggested a site at St Pancras for the new British Library but the books did not leave the museum until 1997.

The Museum today

Today it no longer houses collections of natural history, and the books and manuscripts it once held now form part of the independent British Library. The Museum nevertheless preserves its universality in its collections of artefacts representing the cultures of the world, ancient and modern. The original 1753 collection has grown to over thirteen million objects at the British Museum, 70 million at the Natural History Museum and 150 million at the British Library.
The Round Reading Room, which was designed by the architect Sydney Smirke, opened in 1857. For almost 150 years researchers came here to consult the Museum's vast library. The Reading Room closed in 1997 when the national library (the British Library) moved to a new building at St Pancras. Today it has been transformed into the Walter and Leonore Annenberg Centre. This contains the Paul Hamlyn Library of books about the Museum's collections, which is open to all visitors.
With the bookstacks in the central courtyard of the museum empty, the process of demolition for Lord Foster's glass-roofed Great Court could begin. The Great Court, opened in 2000, while undoubtedly improving circulation around the museum, was criticised for having a lack of exhibition space at a time when the museum was in serious financial difficulties and many galleries were closed to the public. At the same time the African and Oceanic collections that had been temporarily housed in 6 Burlington Gardens were given a new gallery in the North Wing funded by the Sainsbury family - with the donation valued at £25 million.