NATIONAL GALLERY

( in Britain ) the buildings in Trafalgar Square , London, which contain the largest collection of paintings belonging to the nation. The paintings represent every period and style in western art from the 14th to the early 20th century. The main building was completed in 1838, and a new building, the Sainsbury Wing, paid for by members of the family that owns Sainsbury’s and designed by the US architect Robert Venturi , was added in 1991. More modern paintings are held at Tate Britain and Tate Modern .