Polyhedra regular star

Figure 2-56. The four regular star polyhedra [93], From the left, the small stellated dodecahedron great dodecahedron great stellated dodecahedron and the great icosahedron. Used by permission from Oxford University Press.

If the definition of regular polyhedra is not restricted to convex figures, their number rises from five to nine [92], The additional four are depicted in Figure 2-56 they are called by the common name of regular star polyhedra. One of them, viz., the great stellated dodecahedron, is illustrated by the decoration at the top of the Sacristy of St. Peter s Basilica in Vatican City in Figure 2-57. 

Kif urt 2-66. Die lour regular star polyhedra la) Small stellated dodecahedron (b) the great dodecahedron (c) great stellated dodecahedron (d) the great icosahedron. From H. M. Cundy and A. P Rollett 2-64. Used by permission of Oxford University F ress. 

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