There are several excellent art galleries in London. You can see many of the treasures of western art, on the tour of London's Art Galleries.
The best art galleries in London, famous for their collections of paintings and sculpture are:
Tate Modern: Tate Modern is UK's national gallery of contemporary art. Located in London, Tate Modern is one among the chain of four Tate galleries in UK. The Tate collection consists of some of the finest collections of British art dating back from 1500 to today's modern era.
Tate Britain: Tate Britain is one among the Tate's chain of art galleries in UK. Tate Britain is strategically located at Millbank, London.
It boasts of a fine collection of British art, which includes works of luminaries of the stature of Blake, Constable, Spencer, Rossetti, Hogarth and Gainsborough to name just a few. There is an exclusive wing, which showcases the works of renowned artist JMW Turner. Other notable exhibits include John Waterhouse' - "The Lady of Shalott", John Everett Millais "Ophelia". Recent additions at Tate Britain are the works of David Hockney, Peter Blake and Francis Bacon.
Queens Gallery: The Queens Gallery at Buckingham Palace is a virtual treasure trove of art, painting, sculptures, royal furniture, books and manuscripts, jewelry, etc., all of which come under the ambit of The Royal Collection.
The Royal Collection reflects the taste and inclination of British royalty from 16th century to the present day. A staggering 9000 art pieces belong to this elite collection, which is held in trust by the queen for her descendants and the nation as a whole.
National Gallery: The National Gallery has one of the finest collections of European paintings, particularly Western European painting from 1250 to the present day. A visit to the National Gallery is an education in itself which echo's with Europe's rich history, legends and myths. With a rich collection of 2000 plus paintings which includes the works of all the renowned European School of Paintings inclusive of masterpieces by some of Europe's great artists, the National Gallery does have a magnetic appeal as far as art and culture is concerned.
Apart from these famous galleries, London has other galleries like the National Portrait Gallery, Somerset House Galleries, Hayward Gallery, Wallace Collection, Serpentine Gallery.