Early in 1964, Warhol began silk-screening these photographs onto pre-coloured grounds. Between May and November, he made more than 300 Jackie paintings. Many of them measured 20in by 16in (51cm by 41cm) individually, and could be arranged in various combinations to form larger, gridded compositions. Today they range in price from $1.2m to tens of millions of dollars for the multiple portraits. To celebrate the 50th anniversary of their creation, the Blain Di Donna gallery in New York has brought together more than 20 of the paintings in the first exhibition to focus solely on this series. more