Herma

In the earliest times Greek divinities were worshiped in the form of a heap of stones or a shapeless column of stone or wood. In many parts of Greece there were piles of stones by the sides of roads, especially at their crossings, and on the boundaries of lands. The religious respect paid to such heaps of stones, especially at the meeting of roads, is shown by the custom of each passer-by throwing a stone on to the heap or anointing it with oil.[2] Later there was the addition of a head and phallus to the column, which became quadrangular (the number 4 was sacred to Hermes).[3]

Herma with the head of Herakles (Hermherakles). Museum of Ancient Messene, Greece

In ancient Greece the statues were thought to ward off harm or evil, an apotropaic function, and were placed at crossings, country borders and boundaries as protection, in front of temples, near to tombs, outside houses, in the gymnasia, palaestrae, libraries, porticoes, and public places, at the corners of streets, on high roads as sign-posts, with distances inscribed upon them.[4] Before his role as protector of merchants and travelers, Hermes was a phallic god, associated with fertility, luck, roads and borders. His name perhaps comes from the word herma, referring to a square or rectangular pillar of stone, terracotta, or bronze; a bust of Hermes' head, usually with a beard,[5] sat on the top of the pillar, and male genitals adorned the base. The surmounting heads were not, however, confined to those of Hermes; those of other gods and heroes, and even of distinguished mortals, were of frequent occurrence. In this case a compound was formed: Hermathena (a herm of Athena), Hermares (of Ares), Hermherakles (of Herakles), Hermaphroditus (of Aphrodite—not to be confused with the son of Hermes and Aphrodite with the same name, Hermaphroditus, who had the genitals of both sexes), Hermanubis, Hermalcibiades, and so on. In Athens, where the hermai were most numerous and most venerated, they were placed outside houses as apotropes for good luck.[6] They would be rubbed or anointed with olive oil and adorned with garlands or wreaths.[7] This superstition persists, for example the Porcellino bronze boar of Florence (and numerous others like it around the world), where the nose is shiny from being continually touched for good luck or fertility.

Archaic bearded head of Hermes from a herm, early 5th century BC

In Roman and Renaissance versions (termini), the body was often shown from the waist up. The form was also used for portrait busts of famous public figures, especially writers like Socrates and Plato. Sappho appears on Ancient Greek herms, and anonymous female figures were often used from the Renaissance on, when herms were often attached to walls as decoration.

In 415 BC, on a night shortly before the Athenian fleet was about to set sail for Syracuse during the Peloponnesian War (see Sicilian Expedition), all of the Athenian hermai were vandalized. Many people at the time thought such an impious act would threaten the success of the expedition.[8] Though it was never proven, the Athenians at the time believed it was the work of saboteurs, either from Syracuse or Spartan sympathizers from Athens itself; one suspect was the writer Xenophon.[9] Enemies of Alcibiades, using the anger of the Athenians as a pretext to investigate further desecrations, accused him of other acts of impiety, including mutilations of other sacred objects and mocking performances of religious mystery ceremonies.[10] He denied the accusations and offered to stand trial, but the Athenians did not want to disrupt the expedition any further, and his opponents wanted to use his absence to incite the people against him at a time when he would not be able to defend himself. Once he had left on the expedition, his political enemies had him charged and sentenced to death in absentia, both for the mutilation of the hermai, and the supposedly related crime of profaning the Eleusinian Mysteries.

The J. Paul Getty Museum in Los Angeles has a large collection of Roman Herma boundary marker stones in its stored collection.

An Aesop's fable makes fun of a statue of Hermes. When a pious dog offers to 'anoint' it, the god hastily assures his worshipper that this is not necessary.[11]

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  Small terracotta herm of Hermes
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  Archaic Greek herm, presumably of Hermes, unusual in that the penis has survived
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  Herm on an Attic red-figure lekythos, 475–450 BC
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  A hermaic sculpture of an old man, probably a philosopher. Ai Khanoum, Afghanistan, 2nd century BC
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  Male and female Baroque herms at the Rubenshuis
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  Art Nouveau herms in Poland
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  Busts from a Roman double herm of Seneca and Socrates

• Caryatid
• Atlantid
• Lingam

Wikimedia Commons has media related to Hermae.

Wikisource has the text of the 1911 Encyclopædia Britannica article Hermae.

• Ancient Greek Art: Herm Statue, Theoi Project
• A Dictionary of Greek and Roman antiquities (1890), Perseus Project
• Herm (Greek religion)– Britannica Online Encyclopedia
• Influence of the Phallic Idea: Hermae, Termini, Pillars and "Groves"
• Ice Herms, with primary source passages on ancient herms and on the sacrilege trial of Alcibiades, images of ancient herms from sculpture and vase painting, and photos (including a step-by-step guide to the making) of the University of Chicago ice herms