Császár Polyhedron
A Polyhedron topologically equivalent to a Torus discovered in the late 1940s. It has 7Vertices, 14 faces, and 21 Edges, and is the DualPolyhedron of the Szilassi Polyhedron. Its Skeleton is Isomorphic to theComplete Graph 
.
References
Császár, Á. ``A Polyhedron without Diagonals.'' Acta Sci. Math. 13, 140-142, 1949-1950. Gardner, M. ``The Császár Polyhedron.'' Ch. 11 in Time Travel and Other Mathematical Bewilderments. New York: W. H. Freeman, 1988. Gardner, M. Fractal Music, Hypercards, and More: Mathematical Recreations from Scientific American Magazine. New York: W. H. Freeman, pp. 118-120, 1992. Hart, G. ``Toroidal Polyhedra.'' http://www.li.net/~george/virtual-polyhedra/toroidal.html.
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