>>11945333The Icosidodecahedron (with its polyhedral dual as well)
Think Euclids elements has only 13 volumes? Think again, the first english translation, Henry Billingsley in fact contained 16 volumes, the last tomb added by a believe a french geometer named Flussus, hard to find info on this genious ( maybe his name is francois du fois?) not sure the spelling francais.
anywyas, in his addendum he states
> An icosidodecahedron may contain the other five regular bodies. ( the platonic solids) This shape is the unified theory of shapes