Janiform art in Greece and Rome

 Called Janiform after Janus, the two-faced Roman god associated with doorways and beginnings, two-faced head herms, flasks, or vases were produced as early as the 8th century BCE in Athens, though, and a god with two faces appears repeatedly in Sumerian and Babylonian art dating back to the third millenium. The ancient Sumerian deity Isimud was commonly portrayed with two faces facing in opposite directions. Unlike Janus, however, Isimud is not a god of doorways. Instead, he is the messenger of Enki, the ancient Sumerian god of water and civilization. In Hinduism the image of double or four faced gods is quite common, as it is a symbolic depiction of the divine power of seeing through space and time. The supreme god Brahma is represented with four faces. Likewise the Scandinavian god Heimdallr looks similar to Janus and his abode is said to define the limits of the earth and the extremity of heaven.

To the Romans, Janus frequently symbolized change and transitions such as the progress of past to future, from one condition to another, from one vision to another, and young people's growth to adulthood. He represented time, because he could see into the past with one face and into the future with the other. Hence, Janus was worshipped at the beginnings of the harvest and planting times, as well as at marriages, deaths and other beginnings. He represented the middle ground between barbarism and civilization, rural and urban space, youth and adulthood. Having jurisdiction over beginnings, Janus had an intrinsic association with omens and auspices, particularly important to the Romans. 

This artform was particularly favored for herms which were used to mark crossroads or directions, such as in the agora or forum, in sanctuaries, at the entrance to the Acropolis in Athens, and in the doorways of private homes. Widespread during the Hellenistic period, janiform objects with Dionysiac subjects were particularly popular because of Alexander the Great's visit to the Siwa oasis which gave rise to the myth that Alexander was declared the son of Zeus Ammon and thereafter portrayed in juxtapositon to emphasize his divine nature.  Artwork expressing a dual nature, often with divine subjects, continued to inspire classical art through the Roman Period including a satyr paired with a maenad, Herakles with Omphale, a young and old Aristotle. etc.

"Many combinations of heads for janiform herms are well attested and numerous deities were represented in that form. Herms similar to this example were found at Pompeii in the House of the Golden Cupid, the House of Marcus Lecretius, and the House of the Vettii, where they were mounted on slender columns and decorated the gardens of these villas. Such specialized works of art were even more popular at Herculaneum, where herms surmounted by double heads lined garden paths and were placed in the center of gardens or near fountains or pools. The reflection of these sculptures in garden waters increased the visual enjoyment of them and created a spacial effect similar to the illusion of space seen in Roman paintings that decorated the walls of these villas. Within a natural garden environment provided by plantings of boxwood, laurel, ivy, rosemary and evergreens, as cited by ancient literary sources, such herms added an element of man-made beauty and contributed to the fine sense of aesthetics for which the horticultural designs of Hellenistic and Roman gardens are known." - Phoneix Ancient Art.

Double herm of Homer (Apollonius of Tyana type) and Menander. Pentelic marble, Roman copy from the Neronian or Flavian period after a Hellenistic originals. From the Barbuta area in Rome courtesy of Wikimedia Commons contributor Marie-Lan Nguyen.

Double bust of Dionysos as a youth and an adult at the Palatine Museum courtesy of Wikimedia Commons contributor Carole Raddato.

Herm of Metrodorus of Lampsacus (the younger) leaned with his back against Roman, Imperial Era, (2nd-half of the 2nd century CE?). Found in Rome, Italy. Courtesy of Wikimedia Commons contributor Erc Gaba. Profile photo part of the Françoise Foliot collection.

Cast of Portrait double (twin) herma of Herodotus and Thucydides, archetype from 400-350 BCE at NAMA Naples (inv. 6239) courtesy of Wikimedia Commons contributor Zde.

Head of Janus, Vatican Museum, Rome, courtesy of Wikimedia Commons contributor Loudon dodd.

Double Headed Janus Flask (right) and Head Flask Roman 100-200 CE that I photographed at the Getty Villa in Pacific Palisades, California.

Double Headed Janus Flask (right) and Head Flask Roman 100-200 CE that I photographed at the Getty Villa in Pacific Palisades, California.

Double Herm depicting Dionysus and a Satyr Roman 100-199 CE Marble that I photographed at the Portland Art Museum in Portland, Oregon.

Double herm at the Panathenaic Stadium. Athens, Attica, Greece courtesy of Wikimedia Commons contributor LBM1948.

Double portrait of Aristotle with view as old man Roman copy of 4th century BCE Greek original NAMA 3772 that I photographed at "The Greeks" exhibit at The Field Museum in Chicago, Illinois.

The Socrates side of a double portrait of the philosopher Socrates and Seneca with ancient name inscriptions, 3rd century CE, Roman copy of a 1st century CE original, Neues Museum, Berlin courtesy of Wikimedia Commons contributor Carole Raddato.

The Seneca side of a double portrait of the philosopher Socrates and Seneca with ancient name inscriptions, 3rd century CE, Roman copy of a 1st century CE original, Neues Museum, Berlin courtesy of Wikimedia Commons contributor Carole Raddato.

Terracotta vase with janiform heads, 4th century B.C.E., Etruscan, at the Metropolitan Museum of Art in New York. This Etruscan vase is unique because both heads are made from the same mold but are painted to appear different, one representing a satyr with pointed ears and a beard, the other a black man.

Terracotta vase with janiform heads, 4th century B.C.E., Etruscan, at the Metropolitan Museum of Art in New York. This Etruscan vase is unique because both heads are made from the same mold but are painted to appear different, one representing a satyr with pointed ears and a beard, the other a black man.

Double portrait of the philosopher Socrates and Seneca with ancient name inscriptions, 3rd century CE, Roman copy of a 1st century CE original, Neues Museum, Berlin courtesy of Wikimedia Commons contributor Marcus Cyron (digitall enhanced).

A cylinder seal depicting the gods Ishtar, Shamash, Enki, and Isimud, who is shown with two faces (circa 2300 BCE) courtesy of the British Museum Collections and Wikimedia Commons.

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