Provenance provenance of paintings can help resolve ownership disputes. For example, provenance between 1933 and 1945 can determine whether a painting was looted by the Nazis. Many galleries are putting a great deal of effort into researching the provenance of paintings in their collections for which there is no firm provenance during that period. Documented evidence of provenance for an object can help to establish that it has not been altered and is not a forgery, a reproduction, stolen or looted art. Provenance helps assign the work to a known artist, and a documented history can be of use in helping
Up to Now (autobiography) relating to other prominent figures such as the British statesman Viscount Grey. Shaw's book was the first of two autobiographies published in 1929 with the title "Up to Now". The second was by the American politician and four-time Governor of New York, Al Smith. As "The Times Literary Supplement" pointed out, the title promised more to come, but although Shaw lived on for another thirty years, he never published a sequel. In the late 20th and early 21st centuries, "Up to Now" continued to be used as a source for biographical works on Gordon Craig, Isadora Duncan and Ellen Terry.