Rev. Martin Luther King wrote a paper on Mithraism in 1949. He
also received an A grade on the essay on his presentation skills on an
otherwise difficult concept.
The details of MLK's papers are in Stanford's website - http://mlk-kpp01.stanford.edu/index.php/kingpapers/article/volume_i_13_september_to_23_november_1949/.
I witnessed Mithraism (worship of Mitra) when I was in Rome,
Italy. Mithra (AKA Mitra) is Vedic and Zoroaster's view of the powerful phenomenon
that guided Sun to spring.

The Vatican Museums and Basilica of San Clemente offered me direct
insights into Mithra worship - a likely predecessor to Christianity - a long forgotten
history of reconciliation of a prevailing system to the great spiritual
movement that was gaining sturdy influence with its purer conception of God.
You can witness the mercy, the power of the Sol-God only in
darkness of the labyrinths in the dungeons at San Clemente.
Mithra is the phenomenon that symbolizes the movement of the
Sun away from a Taurus culmination of summer solstice. The slaying of the bull
- "taurobolium", is so evident in the sculptures in the dungeons in Saint
Clemente's basilica. The presence of Ashvins in the rock sculpture; could also be Gemini twins; Saturn giving out the weapon to destroy the bull; Sol and
Luna blessing the act; Sirius the dog, the Lunar nodes shown as a serpent and
Scorpion (scorpio) all active participants marked the new epoch - the birth of
a new era.