Armenian mythology began with ancient Indo-European and Urartian origins, gradually incorporating Mesopotamian, Iranian, and Greek ideas and deities. There are signs which indicate that the ancient Armenians were initially nature worshipers and that this faith in time was transformed to the worship of national gods, many of which originated in neighboring cultures.
The pantheon of Armenian gods (ditsov) formed during the nucleation of the Proto-Armenian tribes that, at the initial stage of their existence, inherited the essential elements of paganism from the Proto-Indo-European tribes that inhabited the Armenian Plateau. Historians distinguish a significant body of Indo-European language used by Armenian pagans as sacred. Original cult worship is a kind of unfathomable higher power or intelligence called Ara, called the physical embodiment of the sun (Arev) worshiped by the ancient Armenians, who called themselves "the children of the sun". Since ancient times, the cult of sun worship occupied a special place in Armenian mythology. Also among the most ancient types of worship of Indo-European roots are the cults of eagles and lions, and the worship of heaven.
Over time, the Armenian pantheon was updated, and new deities of Armenian and not Aryan origins appeared. Furthermore, the supreme god of the Armenian pantheon, Vanatur, was later replaced by Aramazd. Aramazd was the Parthian form of Ahura Mazda. The latter, though, has appeared under the influence of Zoroastrianism (see Ahura Mazda), but with partially preserved traditional Armenian features. Similarly, the traditional Armenian goddess of fertility, Nar, was replaced by Anahit.
Zoroastrianism had a major influence on the Armenians and their mythology. Until the late Parthian period, the Armenian lands doubtless adhered predominantly to Zoroastrianism.