Victor Vasarely (French: [viktɔʁ vazaʁeli]; born Győző Vásárhelyi, Hungarian: [ˈvaːʃaːrhɛji ˈɟøːzøː]; 9 April 1906[1] – 15 March 1997) was a Hungarian-French artist, who is widely accepted as a "grandfather" and leader[2] of the Op art movement.
(wikipedia)