Aha, I was thinking of Yazidi, I believe. Something to do with a peacock symbol, in the faint recesses of my memory. So some follow Zoroaster, interesting. Iran was Zoroastrian (for 2000 years, before that, Hindu) until Mohammedaism was forced on them, nailed shut around 1700 from my reading.
Perhaps you were trying to remember this...
“Peacock Throne, famous golden throne captured from India by the Persians in 1739. Thereafter lost, it (and its reproductions) remained the symbol of the Persian, or Iranian, monarchy.”
I think they still practice their true religion undercover in Iran. It is their great national religion, and from my reading not a bad one, unlike their official “state” religion.