Lucio Fontana, Spatial Concept ‘Waiting’, 1960, canvas, 93 x 73 cm, Tate Modern, London. Source
This is an example of one of Fontana’s Tagli, or ‘cuts’. According to the Tate, these ruptured canvases help to bridge the gap between two- and three-dimensionality. Some of the Tagli feature a painted surface, but this particular one has been left raw and bare.