Untitled , by robert irwin , 1969 , installation , Light and Space style , Circle
An abstract painting of a circle with a line in the middle.
 abstract. The background is white. There is a thin line in the middle of the image. The line is black. There are three circles that are overlapping each other. The circles are light beige in color. The lines are very thin. The surface of the wall is gray. The bottom of the circle is darker than the other three circles.