Roman Opałka was a French-born Polish painter whose medium was numbers and specifically, infinity. In 1965 he began painting the process of counting – from one to infinity. While we often think of art as the expression of emotion, there’s something startling, something starkly beautiful about the expression of process. Starting in the top left-hand corner of the canvas and working to the bottom right-hand corner, the tiny numbers were painted in horizontal rows. As of July 2004, he had reached 5.5 million.