Summanus () was the god of nocturnal

thunder Thunder is the sound caused by lightning. Depending upon the distance from and nature of the lightning, it can range from a long, low rumble to a sudden, loud crack. The sudden increase in temperature and hence pressure caused by the lightning pr ...

ancient Roman religion Religion in ancient Rome consisted of varying imperial and provincial religious practices, which were followed both by the Roman people, people of Rome as well as those who were brought under its rule. The Romans thought of themselves as high ...

, as counterposed to

Jupiter Jupiter is the fifth planet from the Sun and the List of Solar System objects by size, largest in the Solar System. It is a gas giant with a Jupiter mass, mass more than 2.5 times that of all the other planets in the Solar System combined a ...

, the god of diurnal (daylight) thunder. His precise nature was unclear even to

Ovid Publius Ovidius Naso (; 20 March 43 BC – AD 17/18), known in English as Ovid ( ), was a Augustan literature (ancient Rome), Roman poet who lived during the reign of Augustus. He was a younger contemporary of Virgil and Horace, with whom he i ...

. Pliny thought that he was of Etruscan origin, and one of the nine gods of thunder.

Varro Marcus Terentius Varro (116–27 BCE) was a Roman polymath and a prolific author. He is regarded as ancient Rome's greatest scholar, and was described by Petrarch as "the third great light of Rome" (after Virgil and Cicero). He is sometimes call ...

lists Summanus among gods to whom Sabine king Titus Tatius dedicated altars ''( arae)'' in consequence of a votum. Paulus Diaconus considers him a god of lightning. The name ''Summanus'' is thought to be from ''Summus Manium'' "the greatest of the

Manes In ancient Roman religion, the ''Manes'' (, , ) or ''Di Manes'' are chthonic deities sometimes thought to represent souls of deceased loved ones. They were associated with the '' Lares'', '' Lemures'', '' Genii'', and '' Di Penates'' as deities ...

", or ''sub-'', "under" + ''manus'', "hand". According to

Martianus Capella Martianus Minneus Felix Capella () was a jurist, polymath and Latin literature, Latin prose writer of late antiquity, one of the earliest developers of the system of the seven liberal arts that structured early medieval education. He was a native ...

, Summanus is another name for

Pluto Pluto (minor-planet designation: 134340 Pluto) is a dwarf planet in the Kuiper belt, a ring of Trans-Neptunian object, bodies beyond the orbit of Neptune. It is the ninth-largest and tenth-most-massive known object to directly orbit the Su ...

as the "highest" ''(summus)'' of the

. This identification is taken up by later writers such as Camões ("If in Summanus' gloomy realm / Severest punishment you now endure ...") and Milton, in a

simile A simile () is a type of figure of speech that directly ''compares'' two things. Similes are often contrasted with metaphors, where similes necessarily compare two things using words such as "like", "as", while metaphors often create an implicit c ...

to describe

Satan Satan, also known as the Devil, is a devilish entity in Abrahamic religions who seduces humans into sin (or falsehood). In Judaism, Satan is seen as an agent subservient to God, typically regarded as a metaphor for the '' yetzer hara'', or ' ...

visiting

Rome Rome (Italian language, Italian and , ) is the capital city and most populated (municipality) of Italy. It is also the administrative centre of the Lazio Regions of Italy, region and of the Metropolitan City of Rome. A special named with 2, ...

: "Just so Summanus, wrapped in a smoking whirlwind of blue flame, falls upon people and cities".

Georges Dumézil Georges Edmond Raoul Dumézil (4 March 189811 October 1986) was a French Philology, philologist, Linguistics, linguist, and religious studies scholar who specialized in comparative linguistics and comparative mythology, mythology. He was a prof ...

has argued that Summanus would represent the uncanny, violent and awe-inspiring element of the gods of the first function, connected to heavenly sovereignty. The double aspect of heavenly sovereign power would be reflected in the dichotomy

Varuna Varuna (; , ) is a Hindu god. He is one of the earliest deities in pantheon, whose role underwent a significant transformation from the Vedic to the Puranic periods. In the early Vedic era, Varuna is seen as the god-sovereign, ruling the sky ...

Mitra ''Mitra'' (Proto-Indo-Iranian language, Proto-Indo-Iranian: wikt:Reconstruction:Proto-Indo-Iranian/mitrás, ''*mitrás'') is the name of an Indo-Iranians#Religion, Indo-Iranian divinity that predates the Rigveda, Rigvedic Mitra (Hindu god), Mitrá ...

in Vedic religion and in Rome in the dichotomy Summanus- Dius Fidius. The first gods of these pairs would incarnate the violent, nocturnal, mysterious aspect of sovereignty while the second ones would reflect its reassuring, daylight and legalistic aspect.

Temple and cult

The temple of Summanus was dedicated during the

Pyrrhic War The Pyrrhic War ( ; 280–275 BC) was largely fought between the Roman Republic and Pyrrhus, the king of Epirus, who had been asked by the people of the Greek city of Tarentum in southern Italy to help them in their war against the Romans. A ...

c. 278 BCE on June 20. It stood at the west of the

Circus Maximus The Circus Maximus (Latin for "largest circus"; Italian language, Italian: ''Circo Massimo'') is an ancient Roman chariot racing, chariot-racing stadium and mass entertainment venue in Rome, Italy. In the valley between the Aventine Hill, Avent ...

, perhaps on the slope of the Aventine. It seems the temple had been dedicated because the statue of the god which stood on the roof of the temple of Jupiter Capitolinus had been struck by a lightning bolt. Every June 20, the day before the

summer solstice The summer solstice or estival solstice occurs when one of Earth's poles has its maximum tilt toward the Sun. It happens twice yearly, once in each hemisphere ( Northern and Southern). The summer solstice is the day with the longest peri ...

, round cakes called ''summanalia'', made of flour, milk, and honey and shaped as wheels, were offered to him as a token of propitiation: the wheel might be a solar symbol. Summanus also received a sacrifice of two black oxen or wethers. Dark

animals Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia (). With few exceptions, animals consume organic material, breathe oxygen, have myocytes and are able to move, can reproduce sexually, and grow from a ...

were typically offered to

chthonic In Greek mythology, deities referred to as chthonic () or chthonian () were gods or spirits who inhabited the underworld or existed in or under the earth, and were typically associated with death or fertility. The terms "chthonic" and "chthonian" ...

deities.

Comic History of Rome p 145 Discovery of the Head of Summanus

Saint Augustine Augustine of Hippo ( , ; ; 13 November 354 – 28 August 430) was a theologian and philosopher of Berbers, Berber origin and the bishop of Hippo Regius in Numidia (Roman province), Numidia, Roman North Africa. His writings deeply influenced th ...

records that in earlier times Summanus had been more exalted than Jupiter, but with the construction of a temple that was more magnificent than that of Summanus, Jupiter became more honored. Cicero recounts that the clay statue of the god which stood on the roof of the Temple of Jupiter Optimus Maximus was struck by a lightning bolt: its head was nowhere to be seen. The haruspices announced that it had been hurled into the

Tiber River The Tiber ( ; ; ) is the List of rivers of Italy, third-longest river in Italy and the longest in Central Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing through Tuscany, Umbria, and Lazio, where it is joined by the R ...

, where indeed it was found on the very spot indicated by them. The temple of Summanus itself was struck by lightning in 197 BCE.Livy ''AUC'' XXXII 29, 1

Summanus and Mount Summano

Mount Summano (elevation 1291 m), located in the Alps near

Vicenza Vicenza ( , ; or , archaically ) is a city in northeastern Italy. It is in the Veneto region, at the northern base of the Monte Berico, where it straddles the Bacchiglione, River Bacchiglione. Vicenza is approximately west of Venice and e ...

(Veneto, Italy), is traditionally considered a site of the cults of Pluto, Jupiter Summanus, and the

. The area was one of the last strongholds of ancient Roman religion in Italy, as shown by the fact that Vicenza had no

bishop A bishop is an ordained member of the clergy who is entrusted with a position of Episcopal polity, authority and oversight in a religious institution. In Christianity, bishops are normally responsible for the governance and administration of di ...

until 590 CE. Archeological excavations have found a sanctuary space that dates to the first Iron Age (9th century BCE) and was continuously active until late antiquity (at least the 4th century CE). The local flora is very peculiar, because it was customary in ancient times for pilgrims to bring offerings of flowers from their own native lands. The mountaintop is frequently struck by lightning. The mountain itself has a deep grotto named Bocca Lorenza, in which, according to local legend, a young shepherdess became lost and disappeared. The story might be an adaptation of the myth of Proserpina, who was abducted by Pluto.

Notes and references

{{Roman religion Roman gods Thunder gods Night gods Epithets of Śuri