HEMICYCLION (Cetio Faventino, 3° sec dC)

SEMISFERA A FORO SOMMITALE (HEMICYCLION, Cetio F.; SPHERICAL VARIANT, Gibbs) ; vedi Figure ; Bibl. 50, Bibl. 23, Bibl. 35, Bibl. 47, Bibl. 26, Bibl. 18