Archivolt

/ˈɑːkaɪvˌəʊlt/

/ˈɑːɹkaɪvˌoʊlt/

Archivolt

a decorative molding or band that spans the curved underside of an arch, often adorned with intricate sculptural or ornamental details

Examples

1. And the fact that it is in the archivolt of this vault here has led scholars to suggest that it is possible that the Arch of Titus in Rome served as Titus' tomb.