You should look at the YouTube channel of this woman, Janet Stephens, who is a professional hairstylist. She has researched how Greek and Roman women got that amazing hairstyles. She has several other videos, including a recreation of a hairstyle of Cleopatra and TWO on the amazing hair of Julia Domna. You can read an article she published in Journal of Roman Archaeology 2008. I also hear that she presented at AIA this year to great enthusiasm. Too cool.