As most Romanophiles know, Julia Domna was the Syrian wife of the emperor Septimius Severus. Here is a portrait of the Severus family, including the ill-fated sons Caracalla and Geta. Julia Domna's coins are quickly identified by their unique hairstyle.   There are several statues of her, some even believed to have a moveable hairpiece. This aligns with a hairstyle that needed different kinds of wigs.     This is, at least, the tradition