Hecuba and Polymestor. To find out more about Hecuba's revenge, see this Wikipedia article: link; for information about the image: image source.
Hecuba was the wife of King Priam of Troy, and together they had 19 children. During the war with the Greeks, Hecuba sent her youngest son Polydorus to King Polymestor of Thrace to keep him safe. When the Greeks conquered Troy, however, Polymestor murdered Polydorus. Hecuba later takes revenge and blinds Polymestor, as you can see in the image for today.