Artist Ben Quilty with his subject, artist Margaret Olley, in front of Quilty's portrait of her at the Art Gallery of NSW in The Domain, Sydney. Quilty is the winner of the 2011 Archibald Prize. Picture: Alan Pryke

Artist Margaret Olley inspects the Edgar Degas drawing 'Dancer in Fourth Position', circa 1885, which she has donated to the National Gallery of Australia in Canberra. Picture: Ray Strange

Margaret Olley at the launch of Graeme Cowan's book on depression. Picture: Alan Pryke

Margaret Olley on January 23, 1949. Picture: supplied

Artist Margaret Olley stands in front of the new Paul Cezanne painting she helped the Art Gallery of NSW acquire in 2008. Olley dontated $1 million towards the purchase of the painting by the French impressionist entitled 'Bords de la Marne' c1888. Picture: Charlie Brewer

Former prime minister Sir John Gorton with artist Margaret Olley at Museum of Contemporary Art (MCA) at The Rocks in Sydney, during Sir John's biography book launch. Picture: Rohan Kelly

Margaret Olley hosts lunch for Tim Storrier and Jeffrey Smart, on his visit to Australia from Tuscany. Picture: Sarah Rhodes

Artist Margaret Olley at S.H. Ervin Gallery at Observatory Hill in Sydney in 2002, where she collected some of her favorite works for exhibition. Picture: Chris Pavlich

Artist Margaret Olley in Sydney during judging of Doug Moran National Portrait Prize. Picture: Chris Pavlich

Artist Margaret Olley with a copy of a $14 million Paul Cezanne painting titled 'Bords de la Marne' circa 1888, which she wanted the Art Gallery of NSW to buy for the people of NSW. Picture: Noel Kessel

Lauretta Morton hangs one of artist Margaret Olley's paintings of Newcastle at the Newcastle Regional Art Gallery. Picture: Chris Hyde

A painting of Margaret Olley by artist William Dobell. Picture: supplied

Australian artist Margaret Olley.

Portrait of Margaret Olley, 1948 by William Dobell. Picture: supplied