SOURCE: Sebastiano Serlio. Il Secondo libro di perspettiva (Di Architettura, book II) (Venice, 1551), fo. 19 recto NOTES: This 1551 publication formed the first collected edition of all five of Serlio's books on architecture, which had previously appeared as first editions between 1537 and 1547.
SOURCE: Batty Langley. Ancient masonry, both in the theory and practice (London, 1736), vol. II, pl. CCCCXLIX NOTES: This mosaic was destroyed soon after its discovery in the eighteenth century.