Attila Csorco, Platonic Love
''There are only five regular solids in the universe: tetrahedron, cube, octahedron, dodecahedron and icosahedron. The first known description of these solids is found in the writings of Plato, hence the name “Platonic solids”. They all have a “neat” structure: they can all be inscribed within a sphere, and in each solid, all planes, edges and vertices are of the same size. This unique regularity may have inspired Plato to attribute a cosmological significance to these solids: he associated four of the solids with the four elements, while, in his system, the fifth became the foundation of the world.''
Sources: Many Stuff, Attila Csorco