Ancient Aramaic Inscriptions Reveal Christian Expansion And Decline Of Roman Sun Cult Mithraism At Turkey Castle

Ancient inscriptions etched into stone at Zerzevan Castle in southeastern Turkey have unveiled a previously overlooked chapter in the history of early Christianity within the Roman Empire. These texts, written in Aramaic—the vernacular spoken by Jesus—detail the intersection between Christian expansion and the decline of Mithraism, a secretive cult devoted to the sun god Mithras that flourished among Roman soldiers and merchants.

The sanctuary, situated at an ancient military settlement within Diyarbakir's Cinar district, was initially unearthed during excavations in 2017. While the structure itself dates back approximately 1,900 years, it is only recently that a specific inscription discovered at its entrance has been fully deciphered by Professor Mehmet Sait Toprak of Mardin Artuklu University's Syriac Language and Literature Department. By analyzing letter morphology, linguistic patterns, and historical context, the research team determined the text belongs to the third or fourth centuries AD, roughly 300 years after the crucifixion of Jesus.

The inscription serves as a definitive record of the temple's symbolic closure by early Christians around 1,700 years ago. It explicitly references both "Jesus Christ" and Mithras, described in the text as the "Invincible Sun God," an deity originating from Persia who was characterized as a god of light, war, and contracts. According to legend associated with the cult, Mithras emerged fully grown from solid rock, depicted wearing a Phrygian cap while holding a dagger believed to create life through sacrifice and a torch representing worldly illumination.

Inside the remarkably preserved underground temple, archaeologists found physical evidence of its former use as a Mithraeum, including four sacrificial hangers, a basin for collecting bull blood, and three wall niches utilized for secret ceremonies. However, the site's transformation is marked by the discovery of a carved cross at the entrance, which researchers interpret as signaling the formal conversion of the space. The accompanying text invokes the Holy Cross and describes God in terms of order, renewal, and love, reinforcing the conclusion that the sanctuary was repurposed rather than simply abandoned following the Roman emperors' adoption of Christianity.

This discovery offers tangible evidence of a significant religious shift during a period when Mithraism faced increasing opposition as it became viewed as a rival faith to the state-sponsored Christian movement. The findings highlight how physical spaces of worship were repurposed, reflecting broader societal changes that reshaped communities across the empire and ultimately led to the abandonment or conversion of many such temples by the fourth century.

The structure was hewn directly from a massive rock formation located underground on its eastern wall. Columns were carved into this main surface, surrounding a prominent central niche.

Inside the large niche, an ancient plaque depicts a scene of bull sacrifice. Traces of old paint still cling to several of the stone columns today.

Symbolic carvings adorn the space as well. The crown beam motif, representing Mithras, is etched onto the eastern wall. A small niche contained a smoothly carved bowl designed for collecting bull blood. Remnants of a ground-level pool were also discovered within the site.

These features reveal specific religious practices. A channel connected the blood bowl to the pool through the stone walls. Historical records indicate that water played a vital role in Mithraic ceremonies. Furthermore, four symmetrical points on the ceiling facilitated suspending animals during rituals. These fixtures would have been used specifically for sacrificing bulls.

The site's history shifted dramatically with the rise of Christianity. As the new faith spread through the region, conflict erupted between the two belief systems. Ultimately, Christian forces succeeded in claiming these former pagan locations for their own use.