The Roman Senate gradually became what we might now describe as a decidedly multicultural body, and the full list of Roman emperors contains many whose origins lay outside Italy: Caracalla’s father, Septimius Severus, was the first Emperor from Roman territory in Africa; Trajan and Hadrian, who reigned half a century earlier, had come from the Roman province of Spain . . . Rome had been open to foreigners from the beginning.
— Mary Beard in SPQR: A History of Ancient Rome, p. 67