Grand retrointercepted ditetrahedronary prismatodishecatonicosachoron

The grand retrointercepted ditetrahedronary prismatodishecatonicosachoron, or grand tapady, is a nonconvex uniform polychoron that consists of 120 ditrigonary dodecadodecahedra, 720 pentagrammic prisms, and 120 great rhombidodecahedra. Four ditrigonary dodecadodecahedra, 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.