Marble portrait of the boy Caligula (?) This head bears a striking resemblance to representations of the boy Caligula. Modelling private funerary portraits of children after members of the imperial family was common. Thus this could as well portray an unidentified boy, done in the guise of a Julio-Claudian prince.
Romano, Irene B. Classical Sculpture; Catalogue of the Cypriot, Greek and Roman Stone Sculpture in the University of Pennsylvania Museum of Archaeology and Anthropology. Philadelphia: University of Pennsylvania Museum of Archaeology and Anthropology, 2006. See: p. 213, no. 105
White, Donald J., Ann B. Brownlee, Irene B. Romano, and Jean M. Turfa. Guide to the Etruscan and Roman Worlds at the University of Pennsylvania Museum of Archaeology and Anthropology. Philadelphia: University of Pennsylvania Museum of Archaeology and Anthropology, 2002. See: p. 81, no. 121