Models of Polyhedra with Regular Heptagons
Polyhedra with regular heptagons (seven sided polygons) are not very common, except for polyhedra with a seven folded axial symmetry. On this page I gather a few even some that have the seven folded axial symmetry. Most of the others are still based on prisms or anti-prisms, e.g. augmentations of Platonic solids using a prism.
Tri-Composite of Heptagonal Antiprisms
Tri-Composite of {7/3} Antiprisms
Mason Green's Small Supersemicupola
Mason Green's Great Supersemicupola
Augmentations Using Heptagonal Prisms