Thought this was an interesting idea and maybe a cool content video opportunity for someone out there, not really my thing personally. I've been writing a story that loosely incorporates some elements connected to Mithraism while also revisiting Oblivion just by chance and you could say it... dawned on me (please don't throw me out) in a sort of obvious way like an Anvil to the head (I'll stop I swear) that the Mythic Dawn could be a reference to Mithraism, even if only as a historical Christian take on it maybe.

They've got: 
- the name, Mythic Dawn
- the red robes, secret cult society and initiations
- fire symbolism and forbidden knowledge: mithraic knowledge of fire vs Mysterium Xarxes knowledge of opening Oblivion gates 
- the historical demonizing of Mithras/Light-Bringer into Lucifer vs. Mythic Dawn worshiping the obviously visually satanic-like Mehrunes Dagon
- the sacrifice cult stuff… yeah, that’s all over the place in human religions, I know… but it’s also here!
- The historical rivalry with Christianity and Mithraism during Roman rule and the gradual disappearance and replacement of Mithraism... then to see the parallels in this sort of partially Rome-inspired fantasy world I've been vacationing to since the game came out. 
- maybe even more of a stretch but a connection to Christmas colors: the red runes revealed by the “path of dawn at green emperor way”, where the district is obviously lush with greenery and covered in red mushrooms among the tombs 

I am a simple enjoyer of questionable youtube history videos though and no expert on these things, so forgive me if I've got some stuff wrong or if something is obvious and not a mystery. I am but the Leonardo DiCaprio pointing meme. Just thought the visual parallels were pretty cool and couldn't find much info on there being any connections on the wikis, uesp or any gamer theories. What do the Elder Scrolls and Earth lore nerds think?

Mythic Dawn = Mithraism?