And more three milion, nine hundred ninety nine thousand, nine hundred and ninety seven more digital items, here: https://www.si.edu/openaccess
If you #search for #mathematics it gives you 965 #results :
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#Geometric #Model by A. Harry Wheeler, Five #Intersecting Regular #Octahedra #Inscriptible in a Regular #Dodecahedron
https://www.si.edu/object/geometric-model-harry-wheeler-five-intersecting-regular-octahedra-inscriptible-regular-dodecahedron:nmah_1691577
#math