The Art of Mathematics looks at a variety of artists and styles of art. For each artist we give a brief history of their life, links to examples of their work and ideas for mathematical activities to go with specific works. This article looks at the work of Vincent van Gogh. Classroom activities include looking at his famous Sunflowers painting and how the Fibonacci sequence is an example of efficiency in nature. As each row of seeds in a sunflower or pine cone, or petals on a flower grows, it tries to put the maximum number in the smallest space.