article_snippet: That's what art's about.
article_snippet: It's about a legacy, about making something which goes on without you. '
article_snippet: It's a statement of history and now it's in safe hands ... it will never change.'
article_snippet: It has captured a part of history.'
article_snippet: Sir Nicholas Serota, director of the Tate, said: 'It's a work we've always wanted to bring into the collection. '
article_snippet: The 'really important work' was being given 'a historical dimension', Jay Jopling added as 'part of the story of British art over a long period'.