Gravitation (also known as Gravity) is a mixed media work by the Dutch artist M. C. Escher completed in June 1952.

It was first printed as a black-and-white lithograph and then coloured by hand in watercolour.

It depicts a nonconvex regular polyhedron known as the small stellated dodecahedron.

Out of these doorways protrude the heads and legs of twelve turtles without shells, who are using the object as a common shell.

The turtles are in six coloured pairs (red, orange, yellow, magenta, green and indigo) with each turtle directly opposite its counterpart.