 The monumental building housing the Historical Museum was built by Bhimsen Thapa, prime minister of Nepal in the 18th century.Riches of Nepal’s biodiversity are exhibited in these chambers — mammals, amphibians, reptiles, birds, butterflies and insects.Pelt, horn or endo-skeletons of tiger, leopard, red panda, flying squirrel, rhinoceros, whale, colourful plumage of birds may be cited.