Proserpina in the context of "Secular Games"

In ancient Roman religion and mythology, Pluto (Ancient Greek: Πλούτων, romanized: Ploútōn, Latin: Plūto or Plūton), also known as Dis Pater or Orcus, was the god of the dead and the king of the underworld. The name was originally an epithet or theonym for Hades in ancient Greek religion and mythology, although Pluto was more associated with wealth and never used as a synonym for the underworld itself, representing a more positive concept of the god who presides over the afterlife. He was the eldest son of Saturn (Cronus) and Ops (Rhea), as well as the brother of Jupiter (Zeus) and Neptune (Poseidon). Pluto later married Proserpina (Persephone) and shared many of Hades' attributes, such as the bident, the cap of invisibility, and the three-headed guard dog Cerberus.

While Pluto is commonly considered the Roman equivalent of Hades, the name Plouton was already used by the Greeks to designate Hades and was later adopted by the Romans for their god of the underworld, Dis Pater, which often means "Rich Father" and is perhaps a direct translation of Plouton. Pluto was also identified with the obscure god Orcus, name that the Romans adopted from the Etruscans and which, like Hades, was both for the god of the underworld and for the underworld as a place. On the other hand, Ploutōn was frequently conflated with Ploûtos, the Greek god of wealth, because mineral wealth was found underground and because, as a chthonic god, Pluto ruled the deep earth that contained the seeds needed for a bountiful harvest.

In ancient Roman religion, Ceres (/ˈsɪəriːz/ SEER-eez, Latin: [ˈkɛreːs]) was a goddess of agriculture, grain crops, fertility and motherly relationships. She was originally the central deity in Rome's so-called plebeian or Aventine Triad, then was paired with her daughter Proserpina in what Romans described as "the Greek rites of Ceres". Her seven-day April festival of Cerealia included the popular Ludi Ceriales (Ceres's games). She was also honoured in the May lustration (lustratio) of the fields at the Ambarvalia festival: at harvesttime: and during Roman marriages and funeral rites. She is usually depicted as a mature woman.

Ceres is the only one of Rome's many agricultural deities to be listed among the Dii Consentes, Rome's equivalent to the Twelve Olympians of Greek mythology. The Romans saw her as the counterpart of the Greek goddess Demeter, whose mythology was reinterpreted for Ceres in Roman art and literature.

Mystery religions, mystery cults, sacred mysteries or simply mysteries (Greek: μυστήρια), were religious schools of the Greco-Roman world for which participation was reserved to initiates (mystai). The main characteristic of these religious schools was the secrecy associated with the particulars of the initiation and the ritual practice, which may not be revealed to outsiders. The most famous mysteries of Greco-Roman antiquity were the Eleusinian Mysteries, which predated the Greek Dark Ages. The mystery schools flourished in Late Antiquity; Emperor Julian, of the mid-4th century, is believed by some scholars to have been associated with various mystery cults—most notably the mithraists. Due to the secret nature of the schools, and because the mystery religions of Late Antiquity were persecuted by the Christian Roman Empire from the 4th century, the details of these religious practices are derived from descriptions, imagery and cross-cultural studies.

Justin Martyr in the 2nd century explicitly noted and identified them as "demonic imitations" of the true faith; "the devils, in imitation of what was said by Moses, asserted that Proserpine was the daughter of Jupiter, and instigated the people to set up an image of her under the name of Kore" (First Apology). Through the 1st to 4th century, Christianity stood in direct competition for adherents with the mystery schools.

In Sabine and ancient Roman religion and myth, Luna (Latin: Lūna [ˈluːna]) is the divine embodiment of the Moon. She is often presented as the female complement of the Sun, Sol, conceived of as a god. Luna is also sometimes represented as an aspect of the Roman triple goddess (diva triformis), along with Diana and either Proserpina or Hecate. Luna is not always a distinct goddess, but sometimes rather an epithet that specializes a goddess, since both Diana and Juno are identified as moon goddesses.

In Roman art, Luna attributes are the crescent moon plus the two-yoke chariot (biga). In the Carmen Saeculare, performed in 17 BC, Horace invokes her as the "two-horned queen of the stars" (siderum regina bicornis), bidding her to listen to the girls singing as Apollo listens to the boys.