Mithraism in the context of "Jesus in comparative mythology"

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.

The Dura-Europos synagogue was an ancient Jewish synagogue discovered in 1932 at Dura-Europos, Syria. The synagogue contained a forecourt and house of assembly with painted walls depicting people and animals, and a Torah shrine in the western wall facing Jerusalem. It was built backing on to the city wall, which was important in its survival. The last phase of construction was dated by an Aramaic inscription to 244 CE, placing it among just a handful of synagogues from antiquity discovered and unequivocally identified by archaeologists. It was unique among the many ancient synagogues that have emerged from archaeological excavations as the structure was preserved virtually intact, and it had extensive figurative wall-paintings, which in 1932 still came as a considerable surprise to scholars. The synagogue remains, including the murals, are now preserved in the National Museum of Damascus.

Dura-Europos was a small garrison and trading city on the river Euphrates, and usually on the frontier between the Eastern Roman Empire and the Parthian and finally the Sassanid Empires of Persia. It changed hands at various points but was Roman from 165 AD. Before the final Persian destruction of the town in 256–257 AD, parts of the synagogue which abutted the main city wall were apparently requisitioned and filled with sand as a defensive measure. The city was abandoned after its fall and never resettled, and the lower walls of the rooms remained buried and largely intact until excavated. The short measure of time during which it was used ensured that it would have limited impact upon Jewish or Christian art. The excavations also discovered very important wall-paintings from places of worship of Christianity at the Dura-Europos church. In addition, there were wall paintings edifying Mithraism, and fragmentary Christian texts in Hebrew.

Tiridates I (Parthian: 𐭕𐭉𐭓𐭉𐭃𐭕, Tīridāt; Ancient Greek: Τιριδάτης, Tiridátes) was King of Armenia beginning in 53 AD and the founder of the Arsacid dynasty of Armenia. The dates of his birth and death are unknown. His early reign was marked by a brief interruption towards the end of the year 54 and a much longer one from 58 to 63. In an agreement to resolve the Roman–Parthian conflict in and over Armenia, Tiridates I, who was one of the brothers of Vologases I of Parthia, was crowned king of Armenia by the Roman emperor Nero in 66; in the future, the king of Armenia was to be a Parthian prince, but his appointment required approval from the Romans. Even though this made Armenia a client kingdom, various contemporary Roman sources thought that Nero had de facto ceded Armenia to the Parthian Empire.

In addition to being king, Tiridates I was also a Zoroastrian priest and was accompanied by other magi on his journey to Rome in 66. In the early 20th century, Franz Cumont speculated that Tiridates was instrumental in the development of Mithraism which ultimately became the main religion of the Roman Army and spread across the whole empire. Furthermore, during his reign, he started reforming the administrative structure of Armenia, a reform which was continued by his successors, and which brought many Iranian customs and offices into it.