Montagu House, Bloomsbury, London, England= Montagu House (sometimes spelled "Montague") was a late 17th-century mansion in Great Russell Street in the Bloomsbury district of London, which became the first home of the British Museum.The house was actually built twice, both times for the same man, Ralph Montagu, 1st Duke of Montagu. The late 17th century was Bloomsbury's most fashionable era, an...