Iconography
Ancient pictures of the Roman twins usually follow certain symbolic traditions, depending on the legend they follow: they either show a shepherd, the she-wolf, the twins under a fig tree, and one or two birds (Livy, Plutarch); or they depict two shepherds, the she-wolf, the twins in a cave, seldom a fig tree, and never any birds (Dionysius of Halicarnassus).
Also there are coins with Lupa and the tiny twins placed beneath her.
The Franks Casket, an Anglo-Saxon ivory box (early 7th century AD) shows Romulus and Remus in an unusual setting, two wolves instead of one, a grove instead of one tree or a cave, four kneeling warriors instead of one or two gesticulating shepherds. According to one interpretation, and as the runic inscription ("far from home") indicates, the twins are cited here as the Dioscuri, helpers at voyages such as Castor and Polydeuces. Their descent from the Roman god of war predestines them as helpers on the way to war. The carver transferred them into the Germanic holy grove and has Woden’s second wolf join them. Thus the picture served — along with five other ones — to influence "wyrd", the fortune and fate of a warrior king.
Read more about this topic: Romulus