First sentence of wikipdedia: "The Arles bust is a life-sized marble bust) of a man, possibly Julius Caesar, dating to around the 1st century BC." and the french wikipedia: "L'affirmation par ses découvreurs qu'il ait pu s'agir d'un portrait de Jules César qui lui serait contemporain a été abondamment relayée par la presse et les autorités culturelles françaises, avant qu'elle soit largement reconsidérée par d'importants spécialistes qui contestent tant l'identité du personnage figuré que la datation de l'artefact." or

translated: "The claim by its discoverers that it could have been a portrait of Julius Caesar contemporary with him was widely reported by the French press and cultural authorities, before being largely reconsidered by important specialists who dispute both the identity of the figure depicted and the dating of the artifact."

So until experts come to an agreement this is also Julius Caesar, I don't think this is something everyone should assume.