Great grand hecatonicosachoron

The great grand hecatonicosachoron, or gaghi, also commonly called the great grand 120-cell, is one of the 10 regular Schläfli–Hess polychora. It has 120 great dodecahedra as cells, joining 3 to an edge and 12 to a vertex in the form of a great stellated dodecahedron.

It is a faceting of the small stellated hecatonicosachoron, sharing its vertices and edges. It is the only other regular polychoron to do so.

Vertex coordinates
Its vertices are the same as those of its regiment colonel, the small stellated hecatonicosachoron.