Marduk.
Babel (Babylon).
Darius was king of the Persian Empire, not a god. Babylon was part of his empire.
Marduk (Mer′o‧dach - in Hebrew)was the most important Babylonian god, whose downfall was foretold to coincide with Babylon's overthrow. The Persian conqueror, Cyrus the Great, conquered Babylon and Babylonian religion of Marduk, ended.-Jeremiah 50:1 & 2.In Babylon, the temple of Marduk had been the central feature , andBabylonian history identifies Marduk as the son of Ea (the god presiding over the watery element), the consort of Sarpanitu, and the father of Nebo. When Marduk became the chief god of Babylon, he was also given the name Bel (meaning Master).
INDRA was the most important god of Aryans
the river god or the sun god were the most important gods to the egyptians
Nissaba
Indra or Purandhara was the most important God in the rigvedic period.
Zeus is the most important god
Daniel the prophet.
One of the most important cities of the mesopotamian civilizations was Ur which was present in the area since the Sumer empire.
Ra, the sun god
Ra,h is the god of creation