Interlocking Shapes

Looking at the skyline of the buildings in this painting of an Italian square,  you can see that the shapes of the buildings interlock like puzzle pieces with the shape of the sky.  As I said in the last post, straight lines are boring.  If the skyline is a straight line, the sky shape will tend to be a boring shape, too.  The intrusion of the statues and figures into shadow areas  help break up rather rectangular shapes.  Even the shadow shapes interlock with the sunny parts of the plaza.  

In addition I was conscious of the limited palette as well.  Warm vs. cool, complementary colors of yellow and muted purples, and grayed mixtures of those two colors provide contrast and interest.