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.