Today from the J Paul Getty Museum, a marble head of Agrippina the Younger, sister to the Emperor Caligula, niece and wife of Claudius and mother of Nero. Contemporary accounts of her are overwhelmingly negative, but I have always had a soft spot for her. Her family did not exactly do shrinking violets. By far the best modern account is Anthony Barrett's Agrippina: Sex, Power, and Politics in the Early Empire.
Statues of Agrippina are distinguished by her narrow face, dimpled chin, and protruding upper lip. She wears her hair parted in the middle and pulled back, with tight curls surrounding her face. It dates to around AD50.