Whispering gallery to the walls, an effect that was discovered in the whispering gallery of St Paul's Cathedral in London. The extent to which the sound travels at St Paul's can also be judged by clapping in the gallery, which produces four echoes. Other historical examples are the Gol Gumbaz mausoleum in Bijapur and the Echo Wall of the Temple of Heaven in Beijing. A hemispherical enclosure will also guide whispering gallery waves. The waves carry the words so that others will be able to hear them from the opposite side of the gallery. The gallery may also be in the form
Collection of the National Gallery, London Collection of the National Gallery, London The National Gallery is the primary British national public art gallery, sited on Trafalgar Square, in central London. It is home to one of the world's greatest collections of Western European paintings. Founded in 1824, from an initial purchase of 36 paintings by the British Government, its collections have since grown to about 2,300 paintings by roughly 750 artists dating from the mid-13th century to 1900, most of which are on display. This page lists some of the highlights of the collection. For the list of all named painters in the collection and their