Projection of the four-dimensional 16-cell
Projection of the regular four-dimensional 16-cell into three-dimensional space. (left model in picture)
The 16-cell is a regular polytope in four-dimensional space. Its boundary consists of 16 tetrahedrons, and contains 32 surfaces, 24 edges and 8 vertices.
Showcase of this model is Case number 20
Schilling, Martin(Hrg.): Catalog mathematischer Modelle, Leipzig(Verlag von Martin Schilling) 1911, 7.Auflage, No.286. p. 155.
Separataband M1 im Mathematischen Institut p. 259-272.