Grand retroditetrahedronary prismatotrishecatonicosachoron

The grand retroditetrahedronary prismatotrishecatonicosachoron, or gardtapthi, is a nonconvex uniform polychoron that consists of 120 great stellated dodecahedra, 120 small ditrigonary icosidodecahedra, 1200 triangular prisms, and 120 great rhombidodecahedra. Four great stellated dodecahedra, four small ditrigonary icosidodecahedra, twelve triangular 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.