Mosaic of St Lawrence
"The Roman Church commends this day to us as the blessed Laurence’s day of triumph, on which he trod down the world as it roared and raged against him; spurned it as it coaxed and wheedled him; and in each case, conquered the devil as he persecuted him. For in that Church, you see, as you have regularly been told, he performed the office of deacon; it was there that he administered the sacred chalice of Christ’s blood; there that he shed his own blood for the name of Christ."
– St Augustine.
Detail from the 13th-century apse mosaics of Santa Maria in Trastevere, and my sermon for St Lawrence's feast day can be found here.