The nave walls below the pilaster capitals are divided into three horizontal registers of fresco. The lowest depicts large "framed panels of stone slabs" in red, green and yellow partly concealed by "red curtains hanging from a horizontal rail" (both fresco motifs were popular in palaeochristian churches). The second register is blank. The third is in several shades of grey, and consists of ten strips of "decorative molding" in a wide band dominated by a central "molding" involving a cylindrical bundle of oak leaves tied with ribbons. This impressive third register is "supported" on painted brackets.