The personification of rivers is particularly common on triumphal arches. In addition to the Arch of Constantine (see Bernard Andreae, Art of Rome [New York: H.N. Abrams, 1977], fig. 8), see the Arch Septimius Severus, published by Hans Peter L’Orange and Armin von Gerken, Der späntike Bildesmuch des konstantinsbogens (Berlin: de Gruyter, 1939), fig. 25. The relief panel of Paris and Oenone, from the Palazzo Spada, was published in Richard Brilliant, Visual Narratives (Ithaca, NY: Cornell Univ. Press, 1984), pl. 2.3.