Read it through once

This is in letters of gold around the apsis of a mosaic group at the side of the 'scala santa', church of St. John Lateran, the Mother and Mistress of all the Catholic churches of the world. The group represents the Saviour, St. Peter, Pope Leo, St. Silvester, Constantine and Charlemagne. Peter is giving the pallium to the Pope, and a standard to Charlemagne. The Saviour is giving the keys to St. Silvester, and a standard to Constantine. No prayer is offered to the Saviour, who seems to be of little importance any where in Rome; but an inscription below says, “Blessed Peter, give life to Pope Leo and victory to king Charles.” It does not say, “Intercede for us, through the Saviour, with the Father, for this boon,” but “Blessed Peter, give it us.”