Sonia Delaunay refused the border every art history draws between painting and everything else. The same discs and contrasts of pure colour that she and her husband Robert Delaunay developed on canvas — Simultanism, the style Guillaume Apollinaire folded into his 'Orphism' — went onto quilts, book covers, dresses, coats, a boutique at the 1925 Exposition des Arts Décoratifs, theatre costumes and fabric by the kilometre. Asked where the art stopped and the decoration began, she declined the question for seventy years.
Born Sarah Stern near Odessa in 1885 and raised Sonia Terk by a prosperous uncle in St Petersburg, she reached Paris in 1905 at nineteen. The founding object of her abstraction was domestic: a patchwork cradle quilt sewn for her son Charles in 1911, whose geometric colour blocks she recognized as a picture. Two years later she and the poet Blaise Cendrars made La Prose du Transsibérien — a poem and a painting printed as one two-metre folding sheet, the most famous artist's book of the century. In 1964 the Louvre showed her collection, the first living woman so honoured; the Légion d'honneur followed in 1975, and she worked until her death in Paris in 1979, at ninety-four.