In a Roman context, “family” extends beyond our usual concepts of nuclear and extended family to include household slaves and their offspring. The laws of the Twelve Tables deriving from the mid-fifth century BCE reveal the extent of patria potestas, the power of the paterfamilias (father of the family) who had the power of life or death over the entire household. As is apparent in the prologue to Plautus' Pot of Gold, it was the duty of the paterfamilias to tend the family cult, maintain the pax deorum, and so ensure the well-being of the whole household. Cato's prayer of purification for his farm (On Agriculture 141) included the welfare of his crops and trees, the protection and welfare of his shepherds and their flocks, and good health and strength for himself, his family (domus), and his household (familia). Also included in the duties of the paterfamilias was the conducting of rituals concerned with birth, marriage, and death. Because these rituals were performed within the family and were not a matter of public record, the surviving literary evidence is scanty.