Nora Heysen was the first woman to be awarded the Archibald Prize, but for most of her life she was defined not by her art, but by her relationship to her famous father, the artist Hans Heysen.
In awarding the 2017 Archibald Prize to Mitch Cairns, the trustees have reaffirmed a tradition of artists painting artists that began with the very first prize in 1921, writes Joanna Mendelssohn.