Ashurism

Ashurism is a term referencing devotion to the god Ashur. King Ushpia is accredited as the founder of the Temple of Ashur, located in the city-state of Aššur.

All the other gods were seen as aspects of the chief god Ashur who was the totality of the gods. According to Morris Jastrow, Ashur derives from the Sumerian god AN.SHAR. AN meaning "heaven" and SHAR literally meaning "whole".Ashur was often depicted as chief of the gods, accredited with ultimate devotion. Ashur is symbolized as a deity in a winged and emanating sun disk.

Ashurism was a part of the Ancient Semitic religions and also closely paralleled to the Proto-Indo European religion.

In Zoroastrianism Ashur is equated with Ahura Mazda. The Ashurites greatly influenced the art in the Achaemenid Empire and both Ahura Mazda and Ashur were equated with almost exact iconography. The application of cuneiform in the Behistun Inscription further supports the link between Ashur and Ahura Mazda. Furthermore it is believed, among historians and scholars, that the name "Ahura Mazda" is derived from the cuneiform "Assara Mazaš". Professor Hommel, supported by Professor Oldenburg, claimed "that this god (Assara Mazaš) is no other than the Iranian Ahura Mazda".

Anshar/Ashur standing on a bull. Excavated from one of the ancient capitals of Assyria, Assur.

A drachm (quarter shekel) coin from the Persian province of Yehud, apparently showing the god YHW (Yahweh) as a bearded man seated on a winged and wheeled throne.

Stone carved Faravahar in Persepolis.

Faravahar of Behistun Inscription

...
Wikipedia