Cain's (Genesis 4:1-17); condemned to a vagabond existence, Cain later built a city (named after his son, Henoch) that for certain Christian theologians--notably Augustine ( City of God , book 15)--represented the evils of the earthly city. In the circle of the lustful, Francesca identified her husband (Gianciotto)--who murdered her and Paolo (Gianciotto's