Mithraea was the immortal realisation of Dawn, the priestess who once resided in Belladona's Keep. Because of her heroic efforts to cleanse the land of the Chaos Taint and restore Eris to life, Dawn was granted the gift of immortality by Sarapis on the 7th of Chronos, 331 AF.
After just a short stay in the mortal realms, Mithraea was captured by the devious Slith. She was trapped on a hidden plane for many years but later escaped and returned to the Prime Material Plane. After several years She departed once more to attend to a civil war between solar spirits on the sun.
When the alien God Bal'met was raised by the Dala'myrr in 609 AF, Mithraea turned Her attention to Sapience once more, joining in efforts to try to stymie His wave of atrocities against mortal and Divine alike. She perished in a final strike against Bal'met in 611 AF, Her light consumed in the face of His malicious hunger.
The realm of Mithraea abounded in imagery and symbolism. Her most prominent symbols included the eight-pointed star, the mithril sunburst, the unblinking eye, and the couchant lion. One of Her Divine emblems glowed on each point of Her star-shaped shrines.