Stainless & Glass Public Art Sculpture in Tucson By Ray King.
It’s shape is a Pentakis Icosidodecahedron, which is 3D the orthographic shadow of the 4D of H4 (and H4φ) 600-cell (s) obtained by folding the 8D object (E8) to 4D. E8 is also known as the 421 polytope.
There is even a 2D color shadow on the patio that looks like my E8 diagram called a E8 Petrie Projection:
