In ancient Roman religion, the Compitalia (Latin: Ludi Compitalicii) was a festival celebrated once a year in honor of the Lares Compitales, household deities of the crossroads, to whom sacrifices were offered at the places where two or more ways meet. The word comes from the Latin compitum, a cross-way.
This festival is more ancient than the building of Rome. It is said by some writers to have been instituted by Tarquinius Priscus in consequence of the miracle attending the birth of Servius Tullius, who was supposed to be the son of a Lar Familiaris, or family guardian deity.
Dionysius says that Servius Tullius founded the festival, which he describes as it was celebrated in his time. Dionysius relates that the sacrifices consisted of honey-cakes (πέλανοι) presented by the inhabitants of each house; and that the people who assisted as ministering servants at the festival were not free men, but slaves, because the Lares took pleasure in the service of slaves. He further adds that the Compitalia were celebrated a few days after the Saturnalia with great splendor, and that the slaves on this occasion had full liberty to do as they pleased.
During the celebration of the festival, each family placed the statue of the underworld goddess Mania at the door of their house. They also hung up at their doors figures of wool representing men and women, accompanying them with humble requests that the Lares and Mania would be contented with those figures, and spare the people of the house. Slaves offered balls or fleeces of wool instead of human figures.
Macrobius says that the celebration of the Compitalia was restored by the Etruscan king Tarquinius Superbus in response to an oracle that "they should sacrifice heads (capita) for heads." The oracle was taken to mean that in order to maintain the health and prosperity of each family, children should be sacrificed to Mania, identified in this case as the mother of the Lares. But Brutus, after overthrowing the line of Tarquin kings, instead satisfied the oracle by exploiting a verbal loophole, substituting "heads" of garlic and poppies.