Where the sumarians polytheistic?

Answer 1

Yes, in that each city-state had its own patrons, temples, and priest-kings.

They include:

• Anu as the full time god, equivalent to "heaven" - indeed, the word "an" in Sumerian means "sky" and his consort Ki, means "Earth".
• Enki in the south at the temple in Eridu. Enki was the god of beneficence, ruler of the freshwater depths beneath the earth, a healer and friend to humanity who in Sumerian myth was thought to have given humans the arts and sciences, the industries and manners of civilization; the first law-book was considered his creation,
• Enlil, lord of the ghost-land, in the north at the temple of Nippur. His gifts to mankind were said to be the spells and incantations that the spirits of good or evil were compelled to obey,
• Inanna, the deification of Venus, the morning (eastern) and evening (western) star, at the temple (shared with An) at Uruk.
• The sun-god Utu at Ur,
• The moon god Nanna at Sippar.