Grand retroditetrahedronary hexacosidishecatonicosachoron

The grand retroditetrahedronary hexacosidishecatonicosachoron, or gardtaxady, is a nonconvex uniform polychoron that consists of 600 regular tetrahedra, 120 great stellated dodecahedra, and 120 small ditrigonary icosidodecahedra. 4 great stellated dodecahedra, 4 tetrahedra, and 4 small ditrigonary icosidodecahedra join at each vertex.

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