But not when Pablo Picasso and Georges Braque started to revolutionize art in the development known as modern art. Central to this, is cubism. It is called cubism, not necessarily because cubes are prominent in this mode of art. It is not the shape, but the manner. Albeit, the name was derived after an artist known as Matisse, described Picasso’s first cubist work as “with little cubes.” Cubism is defined by fragments of geometrical shapes.