Ahriman Timeline

Possible development of the concept of Ahriman in Early Iranian Religion.

Development of Ahriman in religion of Zoroastrianism.

Ahriman further developed during the Achaemenid Empire.

Zorvanism develops at some point during the latter part of the Achaemenid Empire; Ahriman now seen as twin brother of Supreme God Ahura Mazda.

Zoroastrian texts containing tales of Ahriman written down during the Sassanian Empire, preserving his character and legacy to later religions.