Fresco from the altar dedicated to the Lares (Lararium), in
the house of Iulius Polibius at Pompeii (I century A.D.).
The Lares were mythic-ritual personifications of the dead and ancestors.
In the domestic cult, they were venerated around the hearth, beside
which were deposited offerings in their honor. The term lar
indeed signified also the hearth itself, the family household. In the
homes of the most prominent families, the images of the Lares were kept
in a special room or sacred space, called Lararium, a chapel or altar
beside which the family members consummated their meals during the feasts
in honor of the dead, which were in these occasions sumptuously decorated
(Mastrocinque 2005). On February 22, was celebrated the official feast
of the Caristia, an occurrence reserved to familiars and relatives,
during which offerings were made to the Lares and banquets were held
to strengthen the bonds within the family group. Such festivity followed
immediately the Parentalia, the feast of the dead, which was celebrated
from February 13 to 21. The Pompeian image shows a great serpent climbing
from the underground and wrapping around the altar, on which are deposited
the votive offerings in honor of the Lares. The dead could manifest
themselves sometimes in the shape of serpents, animals particularly
associated with the Underworld.
In Virgil’s poem, Aeneas, after having offered a libation on the
burial of his father, Anchises, saw a serpent which appeared and ate
the offerings, then it went slithering in the underground again. The
hero remains uncertain whether it was a manifestation of the protective
spirit of the place (genius loci) or a messenger of his deceased
father (Aeneid, V, 95). Serpent-like elements are rather frequent
in the Etruscan iconography of the demons who guarded the entrance to
the world of the dead.
[Image: http://it.wikipedia.org/wiki/Caristia]