[401] Paulinus thus describes a mosaic of this subject at Fondi, (Epis. xii, ad Severum:)
Petram superstat, ipse petra ecclesiæ,
Ex qua sonori quatuor fontes meant,
Evangelistæ, viva Christi flumina.
“Standing upon a rock is He who is himself the Rock of the church, and from this go forth four voiceful streams, evangelists, the living rivers of Christ.”
The Agnus Dei is still often seen on altar cloths and tombstones.
Et quia celsa (crux) quasi judex de rupe superstat,
Bis geminæ pecudis discors agnis genus hædi
Circumstant solium; lævos avertitur hædos
Pastor et emeritos dextra complectitur agnos.
—Epis. xii, ad Sulpic. Sever.