 Philosophical, geometrical and even theological speculations related to the five regular polyhedra, the cube or hexahedron, the tetrahedron, the octahedron, the icosahedron and the dodecahedron, were known at least from the time of the ancient Pythagoreans. Since Plato’s Timaeus, these five geometrical solids played a leading role, and for the later tradition they became known as the “five Platonic solids”.