The household head of the oikos or oikia, performed the functions of a priest in relation to the home, conducting rituals on a daily basis, to the several deities who safeguarded the prosperity and security of their home including Zeus Ktesios, the protector of their property; to Zeus Herkeios, the protector of the sacred boundary that surrounded their home; and to Apollo Agyieus, the protector of the entrance to their house.