NOTE: This research piece by Claudine Dauphin, Centre National de la Recherche Scientifique, Paris explores both the formal and informal arrangements that developed, typically centring around the triad of the wife, the concubine and the courtesan. The article is taken from Classics Ireland, Volume 3 (1996):
For Baths in illuminated manuscripts, see Theologizing or Indulging Desire: Bathers in the Sacra Parallela (Paris, BnF, gr. 923):
The Sacra Parallela is a theological and ascetic florilegium of biblical (OT and NT) and patristic citations related to a now-lost model entitled Hiera, composed in Palestine by John of Damascus (ca. 675 – ca. 749). The only known copy is a ninth-century manuscript (Paris, BnF, gr. 923) thought to have been produced in a Greek monastery in Italy, possibly in Rome.1 The text contains three treatises— one on God and the Trinity, another on man, and a third on vices and virtues. The scriptural and exegetical citations are arranged in alphabetical order by στοιχεῖα (alphabetical letters) and τίτλοι (titles). The manuscript, lavishly decorated with miniatures executed in a schematized style, represents a defined group of scenes depicting male and female bathers, which, modeled after Graeco-Roman formulae, have never been discussed in light of their value for gender studies.