Religion in the Sasanian Empire

Zoroastrianism, also called Mazdayasna and Behdin, is an Iranian religion centred on the Avesta and the teachings of Zarathushtra Spitama, who is more commonly referred to by the Greek translation, Zoroaster (). Among the world's oldest organized faiths, its adherents exalt an uncreated, benevolent, and all-wise deity known as Ahura Mazda (), who is hailed as the supreme being of the universe. Opposed to Ahura Mazda is Angra Mainyu (), who is personified as a destructive spirit and the adversary of all things that are good. As such, the Zoroastrian religion combines a dualistic cosmology of go

Manichaeism (; in ; ) was a major world religion founded in the third century CE by the Parthian Iranian prophet Mani (216–274) in the Sasanian Empire. It taught an elaborate dualistic cosmology describing the struggle between a good spiritual world of light, and an evil material world of darkness. Through an ongoing process in human history, light is gradually removed from the world of matter and returned to the world of the divine.

thumb|Mandaic language|Mandaic [[incantation bowl from Southern Mesopotamia c. 200–600 CE – Royal Ontario Museum, Toronto, Canada]] Mandaeism (Classical Mandaic: ), sometimes also known as Nasoraeanism or Sabianism, is a Gnostic, Dualistic and ethnic religion with Greek, Iranian, and Jewish influences. Its adherents, the Mandaeans, revere Adam, Abel, Seth, Enos, Noah, Shem, Aram, and especially John the Baptist. Mandaeans consider Adam, Seth, Noah, Shem, and John the Baptist to be prophets, with Adam being the founder of the religion and John being the greatest and final prophet.

Mazdakism (Persian: مزدکیه, romanized: mazdakīye) was an Iranian religion, which was an offshoot of Zoroastrianism.

stepped structure in the Naqsh-e Rustam compound in Fars, Iran

The Elcesaites, Elkasaites, Elkesaites or Elchasaites were an ancient Jewish Christian sect in Lower Mesopotamia, then the province of Asoristan in the Sasanian Empire that was active between the early second century and the fifth century CE. The members of this sect, which originated in the Transjordan, performed frequent baptisms for purification and had a Gnostic orientation.

fire temple in Takht-e Soleyman, major Zoroastrian sacred fire