The original cameo was bounded on the west by the canal B, with the 6th-century church of S.
Representations of apotheoses occur on several works of art; the most important are the apotheosis of Homer on a relief in the Townley collection of the British Museum, that of Titus on the arch of Titus, and that of Augustus on a magnificent cameo in the Louvre.
The ground of these cameo glasses is most commonly transparent blue, but sometimes opaque blue, purple or dark brown.
It has usually been assumed that the incised inscriptions, being the more conventionalized, are all of later date than those in relief; but comparison of Egyptian inscriptions, wherein both incised and cameo characters coexisted back to very early times, suggests that this assumption is not necessarily correct.
The two other most remarkable examples of this cameo glass are an amphora at Naples and the Auldjo vase.
The famous cameo glass was formed by covering a mass of molten glass with one or more coatings of a differently coloured glass.