Collecting from the wider world (1850-75)

The opening of the forecourt in 1852 marked the completion of Robert Smirke's 1823 plan, but already adjustments were having to be made to cope with the unforeseen growth of the collections. Infill galleries were constructed for Assyrian sculptures and Sydney Smirke's Round Reading Room, with space for a million books, opened in 1857. Because of continued pressure on space the decision was taken to move natural history to a new building in South Kensington, which would later become the British Museum of Natural History.
Roughly contemporary with the construction of the new building was the career of a man sometimes called the "second founder" of the British Museum, the Italian librarian Anthony Panizzi. Under his supervision, the British Museum Library (now the British Library) quintupled in size and became a well-organised institution worthy of being called a national library, the largest library in the world after the National Library of Paris.[11] The quadrangle at the centre of Smirke's design proved to be a waste of valuable space and was filled at Panizzi's request by a circular Reading Room of cast iron, designed by Smirke's brother, Sydney Smirke.[23]