As you probably know according to Avesta, Tehran (ancient Rhages) is the holiest Zoroastrian city and the most ancient Zoroastrian sites exist in this city, with no doubt Zoroastrians of Tehran are the oldest religious community of Iran, but why they have no R1a?
However, looks like zoroastrian absorbed altai culture.
mithraism is an oriental rite, religious and myth overspread in the west spatially among roman empire before christ. te an-tiquity of discovered temples in azerbaijan-iran shows it did ad- vent from atropatene (medes empire) and improved by persian empire. it should not be forgotten its ceremonies is one of the most effective rites that could dominate abrahamic religious and zoroastrianism before overspreading into borders of roman empire when the jesus was not born. its sense of space and form of temples are comprehensible regarding to the sequential tem- ples of zoroastrians, jews, romans, christians and etc [1]
rock-born mithras(credit:Carole Raddato from FRANKFURT, Germany)
okunevo:
https://www.academia.edu/11304781/MITHRAISM_AND_ITS_ROLES_ON_THE_FORMATION_OF_RITUAL_ARCHITECTUREthe sacred numberseven te number seven wasthefullest in the manycultures and reli-gions because of connectionwith thecreation story. according tothe holly books`narration; all the universe was created in six days or six stages then the lord spentthe seventh dayto relax.[5], [6]. in many other cultures similar views have been expressed about the creation. ries of mihraism represening by oher reli-gious mithras was the god of the covenant and obligation and mutual faithfulness [7].mithras was born out of a rock in a cave. it re- veals the bull to the ground and sits on its back and plunged the knife into the bull’s shoulder.bull was symbol of terrestrial power. so, rock and soil are holly that caused to build underground rocky temples. also, fire which represents lighting was the symbol of felicity. subsequently, sun- worshiping was another attribute to be recognized. tere was a complex system of seven dignity of initiation with ritual meals that was sacred for mithras worshippers. it was called syndexioi among initiates that “united by the handshake”(figure4)[8]
https://getarumterra.wordpress.com/khakassia-petroglyph-pleiades/