Bechers

This image demonstrates visual unity, because all of the smaller pictures that contribute to the image as a whole appear similar.  This picture uses a rigid grid to show unity.  All of the smaller pictures are in black and white and they all are pictures of similarly shaped objects.  In addition, in each smaller image, there is more "weight" in the bottom of the frame.  The negative space in the background of each image is also pretty consistent.  Each smaller image is proportional in dimension to the whole image.  The evenness between each frame, makes this image visually pleasing.