Hermes: Why Was He the God of Messengers, Travellers and Trade?

Hermes was the god of messengers, travellers and trade because his responsibilities connected communication, journeys and the crossing of boundaries. In ancient Greek religion, he served as the gods’ messenger and protected human messengers, travellers and merchants. Herms at roads and entrances made his protection visible, while his guidance of souls extended it to the passage between life and death.

A rectangular pillar outside a doorway may seem far removed from a god wearing winged sandals. Both belonged to Hermes’ religious world. If you follow his boundary markers, messenger’s staff and Roman identity as Mercury, you can see how apparently separate duties fitted together. A marble herm from Bergama also gives this story a direct connection with the Istanbul Archaeological Museums.

Why was Hermes associated with travel, trade and boundaries?

Hermes’ responsibilities brought together people carrying messages, people making journeys and people moving goods. These activities shared a concern with passage. The Oxford Classical Dictionary describes the functions of the comparable Roman Mercurius through the circulation of goods, people and words. That offers a useful way to understand the connections between Hermes’ familiar roles.

Think of an everyday delivery: goods travel, a person carries them, and a message tells you about their arrival. This is a modern comparison for the linked activities under Hermes’ protection. Ancient Greek religion placed human messengers, travellers and merchants within the care of the same god.

Boundaries gave those connections a physical setting. Stone heaps used as road and boundary markers lay behind the development of herms, according to the Oxford Classical Dictionary. Later pillars bearing Hermes’ head stood at crossroads and doorways. His protection therefore concerned both the journey and the points where someone entered, left or crossed a boundary.

His guidance also reached beyond ordinary travel. As psychopompos, Hermes led the souls of the dead into the afterlife. This duty extended his association with crossings to the boundary between life and death. The traveller’s protector and the guide of souls were the same deity.

Hermes also protected thieves. That responsibility belongs alongside his patronage of merchants and messengers, even if it makes his character less comfortable. In mythology, he stole Apollo’s cattle and made a lyre from a tortoise shell. His stories combined guidance with theft and invention.

Gregory Nagy highlights a particular connection between the cattle story and Hermes’ guiding role. In lines 303 and 392 of the Homeric Hymn to Hermes, guidance concerns showing the way to Apollo’s hidden cattle. Here, the god associated with finding a route was also responsible for the animals’ disappearance.

Where were herms erected, and what were their functions?

From the sixth century BCE, Greeks erected herms with Hermes’ head at crossroads and thresholds. Their placement brought the god into places of passage. A road junction and a house entrance offered different settings, but both were locations where people moved between spaces.

Herms had a distinctive form: a rectangular pillar bearing a head and male genitals. At entrances, crossing points and boundaries, they served to ward off danger. Their anatomy was part of an object used for protection. It should be understood within that religious function.

These pillars were also objects of ritual and worship. People believed that herms at crossroads and thresholds provided magical protection. The University of Edinburgh’s account adds that examples at street corners and in front of houses were expected to bring good fortune and prosperity to the city and its inhabitants.

The destruction of Athenian herms in 415 BCE shows how seriously their sacred status was taken. Widespread damage occurred while Athens was preparing for the Sicilian Expedition. The attack was regarded as a grave act of sacrilege. These were religious objects whose mutilation carried consequences beyond damage to street furnishings.

Their appearance and use later broadened. During the Hellenistic period, herms began to carry the heads of other gods and famous people. They also served decorative purposes alongside religious ones. If you encounter a pillar of this type, its shape alone does not establish that its head represents Hermes.

How does Hermes’ staff differ from the rod of Asclepius?

Hermes’ messenger’s staff is called the kerykeion and is also known as the caduceus. It bears two intertwined snakes. Ancient depictions often add wings. The Metropolitan Museum of Art identifies the messenger’s staff and winged sandals as distinguishing symbols of Hermes.

Asclepius, the healing god, carries a different staff. A single snake winds around his thick rod. The clearest distinction is therefore the number of snakes: two for Hermes, one for Asclepius. Wings frequently accompany Hermes’ version, but the paired snakes provide the direct comparison.

When you examine an ancient image, count the snakes before treating the staff as a healing emblem. The two-snake caduceus belongs to Hermes’ identity as a messenger. The single-snake rod belongs to Asclepius. Their resemblance can hide a difference between the gods represented.

How was Hermes related to the Roman god Mercury?

In Roman religion, Hermes was identified with Mercurius, commonly called Mercury, the god of commerce. A money purse joined his symbols. This Roman identification made the connection with trade especially visible through an object associated with money.

According to ancient tradition, Mercury’s official temple at Rome was established in 495 BCE on the southwestern slope of the Aventine. Its foundation anniversary was celebrated on 15 May. These details place his worship within a specific Roman setting and religious calendar.

Mercury’s cult had close connections with shopkeepers and transporters, especially those carrying grain. His commercial role therefore involved both the sale of goods and their movement. The Oxford Classical Dictionary’s description of goods, people and words in circulation helps connect this Roman evidence with Hermes’ wider responsibilities.

The money purse and the messenger’s staff emphasise different aspects of the identified deity. The purse points to commerce; the staff identifies the messenger. Alongside protection for travellers, these symbols bring trade, communication and movement into the same religious figure.

Timeline

• Sixth century BCE: Herms bearing Hermes’ head were placed at crossroads and thresholds.
• 495 BCE: According to ancient tradition, Mercury’s official temple was established in Rome.
• 415 BCE: Athenian herms suffered widespread damage during preparations for the Sicilian Expedition.
• Hellenistic period: Herms also began to bear heads of other gods and famous people.
• 27 BCE–68 CE: The Roman marble relief of Hermes now in the Metropolitan Museum of Art was made.

Details you won’t find in guidebooks

The name Hermes Propylaios makes his connection with entrances explicit. Propylaios means ‘before the gate’. The title gives a precise location to a god whose responsibilities could otherwise sound abstract: Hermes stood before an entrance, where protection concerned an actual point of passage.

A Roman copy of Hermes Propylaios from Bergama is held in the Istanbul Archaeological Museums. The University of Edinburgh records it as a marble herm measuring 1.19 metres high. For readers travelling to Turkey, this object provides a concrete link between Hermes’ protection of entrances and a museum collection in Istanbul.

The Metropolitan Museum’s marble relief of Hermes, inventory number 1991.11.8, measures 67.9 by 59.7 centimetres. It shows the god wearing a short travelling cloak. The garment adds another sign of travel alongside the winged sandals and messenger’s staff used to identify him.

Although that relief dates to 27 BCE–68 CE, its spiral curls and stiff garment folds deliberately imitate sixth-century BCE Greek art. This is an archaizing style. You are looking at a Roman work that consciously adopts the appearance of much earlier Greek sculpture.

Even the connection between Hermes’ name and stone heaps is debated. One explanation derives his name from herma, meaning a heap of stones. The linguist R. S. P. Beekes rejected that derivation and argued for a pre-Greek origin. The documented association of herms with road markers should therefore be distinguished from the disputed origin of the god’s name.

Hermes’ mythological origins were more personal. He was the son of Zeus and Maia, born in a sacred cave on Mount Kyllene in the Peloponnese. His epithet Kyllenios connected him with that mountain. The god of roads and crossings thus also had a named birthplace in myth.

FAQ

Sources

1. Wikipedia — Hermes en.wikipedia.org
2. Vikipedi — Hermes tr.wikipedia.org
3. Wikipedia — Mount Kyllini en.wikipedia.org
4. The Metropolitan Museum of Art — Greek Gods and Religious Practices metmuseum.org
5. Oxford Classical Dictionary — Mercurius academic.oup.com
6. Oxford Classical Dictionary — herms academic.oup.com
7. J. Paul Getty Museum — Herm of Dionysos artsandculture.google.com
8. Getty — Why Are Ancient Greek Phalluses Funny? getty.edu
9. University of Edinburgh — Hermes Propylaios collections.shca.ed.ac.uk
10. U.S. National Library of Medicine — Asclepius, Hermes, and the Caduceus nlm.nih.gov
11. Froman and Skandalakis — One snake or two: the symbols of medicine pubmed.ncbi.nlm.nih.gov
12. Encyclopaedia Iranica — HERMES iranicaonline.org
13. Harvard Center for Hellenic Studies — A sampling of comments on Odyssey Rhapsody 17 classical-inquiries.chs.harvard.edu
14. The Metropolitan Museum of Art — Marble relief with Hermes metmuseum.org

Image: Exterior view of the illuminated facade of Maison Hermès, Ginza, Tokyo, Japan.jpg — Basile Morin, CC BY-SA 4.0