Jupiter

The Temple of Jupiter Optimus Maximus stood on the Capitoline Hill from 509 BCE, the first year of the Republic, until the Christian emperors closed it in the late fourth century. For a thousand years, every triumphal general rode up the hill to lay his laurels at Jupiter’s feet. The state did not merely worship Jupiter. Jupiter was the state’s self-image: sovereign, just, and thundering.

The Name

The name descends from Proto-Indo-European *Dyēus Phter, “Sky Father.” The same root produced the Greek Zeus Pater, the Vedic Dyaus Pitar, and the first element of the Norse Týr. Speakers of Proto-Indo-European, dispersing from the steppe sometime in the fourth millennium BCE, carried the Sky Father to India, Greece, Rome, and Scandinavia. Jupiter is the Latin pronunciation of the oldest god in the Indo-European world.

The Capitoline Triad

Jupiter shared the Capitoline temple with Juno (his wife, goddess of marriage and childbirth) and Minerva (goddess of wisdom and crafts). This triad replaced an older one consisting of Jupiter, Mars, and Quirinus. The shift from a war-centered triad to one including Juno and Minerva reflected Rome’s evolution from a warrior settlement to an administered state.

The Triumph

A Roman triumph was a religious procession as much as a military parade. The victorious general rode in a four-horse chariot, his face painted red like the statue of Jupiter on the Capitoline. A slave stood behind him holding a golden crown and whispering, according to tradition, “Remember you are mortal.” The general was Jupiter for a day. The reminder was that the day would end.

The Lightning

Jupiter’s weapon was the thunderbolt. When lightning struck within the city of Rome, the spot was consecrated as a bidental and fenced off. The Etruscan discipline of interpreting lightning, which the Romans adopted, divided the sky into sixteen regions. A bolt from the northeast meant Jupiter approved. From the northwest, a warning. The Romans did not merely observe weather. They read it as policy.

Sources

Bibliography. The same list is held in the article’s frontmatter for the citation tools that read it programmatically.

• Livy, Ab Urbe Condita: foundation of Capitoline temple, triumphal processions
• Cicero, De Natura Deorum: Roman theology of Jupiter
• Ovid, Fasti: Jupiter’s festivals and rites