Great retrohecatonicosihexacosihecatonicosachoron

The great retrohecatonicosihexacosihecatonicosachoron, or girhixhi, is a nonconvex uniform polychoron that consists of 120 quasitruncated great stellated dodecahedra, 600 truncated tetrahedra, and 120 icosidodecatruncated icosidodecahedra. Two quasitruncated great stellated dodecahedra, two truncated tetrahedra, and four icosidodecatruncated icosidodecahedra join at each vertex.

Vertex coordinates
The vertices are the same as those of the regiment colonel, the great sphenoverted ditrigonal trishecatonicosachoron.