Set of 70 polyhedron models showing the icosahedron and its 58 stellations, by John L. Hudson, Nottingham, England, United Kingdom, 1986-1987
The icosahedron has 20 sides and is one of the five ‘Platonic’ solids. These special polyhedra are made up of regular polygons. All the faces, angles, vertices and edges are the same as each other. There are only five solids with these properties, a fact which was proved in the 13th book of Euclid’s Elements. Plato considered them to be fundamental to the order of the universe: four were linked to the four elements, and the fifth, the dodecahedron, was connected with the heavens.