Number 15 , by john mclaughlin , 1961 , abstract , Minimalism style , Rectangle, Line
A painting with a black rectangle in the middle of a blue and white square.
A square with a black rectangle in the middle of it.  The rectangle is divided into two sections.  One section is light blue and the other section is white.  There is a thin black line going through the center of the square.  A white background is behind the light blue section.