Yes
Persia used to be a country Islam is a religion.
Islam.
Today it is Islam.
Prior to the conversion to Islam, the predominant religion of Persia was Zoroastrianism.
Islam Is Followed In China, Japan And Pakistan.
The Sunni and the Shia Islam. Shia Islam was made Persia's state religion; Sunni clerics were either killed or exiled from Persia.
Ancient Persia did.
7th century
... Islam is a religion, not a country.
One where there was plenty of blood
Christianity followed by Islam, Buddhism, Wicca
The most widely practiced religion in Ancient Persia is now known as Zoroastrianism. However, in the centuries after the Islamic conquest of Persia, most Persians converted to Islam (both by choice and from fear of violence). Islam (specifically Twelver Shiite Islam) is the dominant religion among ethnic Persians today.