Septimius Bassianus, nicknamed Caracalla (or Caracallus) and later known as Marcus Aurelius Antoninus, was born in Lyon in 188 A.D., the first son to the Emperor Septimius Severus and his second wife Julia Domna. In an effort to establish his own dynasty, Septimius Severus declared the very young Caracalla a Caesar in 196, Augustus in 198 and joint-consul with himself in 202.
Caracalla has two distinct eras of portrait types, as a boy emperor 198-209 and as a sole emperor 212-217. This example falls into the first category and finds a close parallel from Kula, no. 162, p. 306 in Vermeule, Roman Imperial Art in Greece and Asia Minor.