Worship or deification of fire (also pyrodulia, pyrolatry or pyrolatria) is known from various religions. Fire has been an important part of human culture since the Lower Paleolithic. The earliest known traces of controlled fire were found at the Daughters of Jacob Bridge, Israel, and dated to 790,000 years ago. Religious or animist notions connected to fire are assumed to reach back to such early pre-Homo sapiens times.
In Indo-European languages, there were two concepts regarding fire: that of an animate type called *egni- (cf. Sanskrit agni English ignite from Latin ignis, and Russian ogon), and an inanimate type *paewr- (cf. English - fire, Greek pyr, Sanskrit pu). A similar distinction existed for water.
Archaeologically, the earliest evidence for Indo-Iranian fire worship is found at the transition from the Sintashta-Petrovka to the Andronovo culture around 1500 BC, together with first evidence of cremation. While cremation became ubiquitous in Hinduism, it came to be disavowed in Zoroastrianism. However, even earlier evidences of vedic fire altars have been found at the Indus Valley sites of Kalibangan and Lothal, giving rise to speculations toward earlier assumed the geographical location of the early Indo-Iranians.
Although the term "fire-worshippers" is primarily associated with Zoroastrians, the idea that Zoroastrians worship fire is originally from anti-Zoroastrian polemic. Instead, fire—even in a fire temple (the Zoroastrian terms are more prosaic and simply mean "house of fire")—is considered to be an agent of purity and as a symbol of righteousness and truth. In the present day this is explained to be because fire burns ever-upward and cannot itself be polluted. Nonetheless, Sadeh and Chaharshanbe Suri are both fire-related festivals celebrated throughout Greater Iran and date back to when Zoroastrianism was still the predominant religion of the region.
In Vedic disciplines of Hinduism, fire is a central element in the Yajna ceremony, with Agni, "fire", playing the role as mediator between the worshipper and the other gods. Related concepts are the Agnihotra ritual, the invocation of the healing properties of fire; the Agnicayana ritual, which is the building of a fire altar to Agni; and Agnistoma, which is one of the seven Somayajnas. In the Vaishnav branch of Hinduism, Agni or Fire is considered the tongue of the Supreme Lord Narayana, hence all the sacrifices done even to any demigod ultimately is a sacrifice to the Supreme Lord Narayana.
In Albanian mythology the deification of fire is associated with En or Enji, a fire deity firstly worshiped by the Illyrians whose name continues to be used in the Albanian language to refer to Thursday (enjte).
Fire worship in Graeco-Roman tradition had two separate forms: fire of the hearth and fire of the forge. Hearth worship was maintained in Rome by the Vestal Virgins, who served the goddess Vesta, protector of the home, who had a sacred flame as the symbol of her presence in the city (cf. Sacred fire of Vesta). The Greek equivalent of the goddess was Hestia, whose worship took place more commonly within the household. The fire of the forge was associated with the Greek god Hephaestus and the Roman equivalent Vulcan. These two seem to have served both as craft-guild patrons and as protectors against accidental fires in cities. Also associated with fire is the titanic god Prometheus, who stole fire for humans from the gods. Most forms of worship in Graeco-Roman religion involved either cooking or burning completely an animal on a fire made on an altar in front of a temple (see hecatomb).
In Slavic mythology, Svarog, meaning "bright and clear", was the spirit of fire. The best known and dramatic among numerous Slavic Pagan fire rituals is the jumping over the bonfire on the Ivan Kupala Day.
Fire is an element of theophany in the Hebrew Bible's burning bush, pillar of fire, and the flame of the Menorah. The highest form of sacrifice was the Korban Olah, performed twice-daily, which is an animal sacrifice completely consumed by fire.
Islam on the other hand has no rituals associated with fire and burning. The Quran describes the devil as a creature of fire. The devil's rejection and contempt toward humans originate from the devil's perception that fire is superior to mud. This sentiment was the cause of the devil's banishment from the heavens.
Fire continues to be a part of many human religions and cultures. For example, it is used in cremation and bonfires; candles are used in various religious ceremonies; eternal flames are used to remind of notable occasions; and the Olympic Flame burns for the duration of the games.