Osiris

Osiris, in Egyptian mythology, one of the principal deities. Originally the local god of Abydos and Busiris, Osiris, who represented the male productive force in nature, became identified with the setting sun. Thus he was regarded as the ruler of the realm of the dead in the mysterious region below the western horizon. Osiris was the brother and husband of Isis, goddess of the earth and moon, who represented the female productive force in nature. According to legend, Osiris, as king of Egypt, found his people plunged in barbarism and taught them law, agriculture, religion, and other blessings of civilization. He was murdered by his evil brother, Set, who tore the body to pieces and scattered the fragments. Isis found and buried his scattered remains, however, and each burial place was thereafter revered as sacred ground. Their son Horus, sired by a temporarily regenerated Osiris, avenged his father's death by killing Set and then ascended the throne. Osiris lived on in the underworld as the ruler of the dead, but he was also, through Horus, regarded as the source of renewed life.
The cult of Isis spread from Alexandria throughout the Hellenistic world after the 4th century BC. It appeared in Greece in combination with the cults of Horus, her son, and Serapis, the Greek name for Osiris. The Greek historian Herodotus identified Isis with Demeter, the Greek goddess of earth, agriculture, and fertility. The tripartite cult of Isis, Horus, and Serapis was later introduced (86 BC) into Rome in the consulship of Lucius Cornelius Sulla and became one of the most popular branches of Roman religion. It later received a bad reputation through the licentiousness of some of its priestly rites, and subsequent consuls made efforts to suppress or limit Isis worship. The cult died out in Rome after the institution of Christianity, and the last remaining Egyptian temples to Isis were closed in the middle of the 6th century AD.

Suggested Reading: