sentences:  One of the Tate's most publicised art events is the awarding of the annual Turner Prize, which takes place at Tate Britain.The original Tate was called the National Gallery of British Art, situated on Millbank, Pimlico, London at the site of the former Millbank Prison.The idea of a National Gallery of British Art was first proposed in the 1820s by Sir John Leicester, Baron de Tabley.