Grand retroditetrahedronary prismatodishecatonicosachoron

The grand retroditetrahedronary prismatodishecatonicosachoron, or gard tapady, is a nonconvex uniform polychoron that consists of 120 great stellated dodecahedra, 720 pentagrammic prisms, and 120 great rhombidodecahedra. Four great stellated dodecahedra, twelve pentagrammic prisms, and twelve great rhombidodecahedra join at each vertex.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the grand ditetrahedronary hexacosidishecatonicosachoron.