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, the Friends organisation 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 (2.0 km) 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 Great Court emerges (1975–2000) The departure of the British Library to a new site at St Pancras, finally achieved in 1998, provided the space needed for the books. It also created the opportunity to redevelop the vacant space in Robert Smirke's 19th-century central quadrangle into the Queen Elizabeth II Great Court – the largest covered square in Europe – which opened in 2000. The ethnography collections, which had been housed in the short-lived Museum of Mankind at 6 Burlington Gardens from 1970, were returned to new purpose-built galleries in the museum in 2000.
The museum again readjusted its collecting policies as interest in "modern" objects: prints, drawings, medals and the decorative arts reawakened. Ethnographical fieldwork was carried out in places as diverse as New Guinea, Madagascar, Romania, Guatemala and Indonesia and there were excavations in the Near East, Egypt, Sudan and the UK. The Weston Gallery of Roman Britain, opened in 1997, displayed a number of recently discovered hoards which demonstrated the richness of what had been considered an unimportant part of the Roman Empire. The museum turned increasingly towards private funds for buildings, acquisitions and other purposes.