In 1949 Lucio Fontana mounted a square, one meter by one meter sheet of white paper on a canvas. Instead of drawing or painting on it, he perforated the sheet from the back with a number of holes, concentrated at the center and extending across the sheet in circular and spiral patterns. In the wake of this discovery, Fontana developed the idea of the perforated painting surface in hundreds of variants and gave all his works the collective title Concetto spaziale or Spatial Concept.
