“The Good Shepherd,” one of two superb lunette mosaics in the cross-arms of the small, cruciform mausoleum built in Ravenna for Galla Placidia, Valentinian III’s mother, features Christ as a Hellenistic, beardless youth.

Heaven and the symbols of the four evangelists are represented in the central dome.

The figures of the apostles decorate the walls of the dome around the windows.

The lunette facing “The Good Shepherd” portrays Saint Lawrence with the symbol of his martyrdom and a book cabinet holding the four Gospels.

Rich naturalistic and geometric decoration covers the vaults, the arches, and the other two lunettes.