Icosidodecahedral prismatohexacosihecatonicosachoron

Alasdair Urquhart was nice enough to identify the model that’s dominating the lounge at BIRS. It’s an icosidodecahedral prismatohexacosihecatonicosachoron, and is made of 120 icosidodecahedra, 600 cuboctahedra, 720 pentagonal prisms, its faces are 3600 triangles, 3600 squares, 1440 pentagons, and it has 10,800 edges. I’m sure it’s got something to do with E8 (the mapping of which was announced yesterday) but I have no idea what.

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