To paint space, I owe it to myself to go there, to that very space… without illusions or tricks, nor with a plane or a parachute or a rocket ship: [the painter of space] must go there by his own means, with an independent individual force, in a word, he must be capable of levitation.
Yves Klein
Photograph of a performance by Yves Klein at Rue Gentil-Bernard, Fontenay-aux-Roses, October 1960, by Harry Shunk. Le Saut dans le Vide (Leap into the Void).