Meskiaggasher was the son of the Sumerian sun god Utu and a ‘normal’ mortal mother. He was the founder of the first dynasty of the city of Uruk and, according to the legends, ruled for 324 years. Back then, Uruk was still a very small settlement.
So small, that his son is often mentioned as the actual founder of Uruk. Besides his lengthy reign, his most notable accomplishment was being the begetter of Enmerkar. It is unknown how Meskiaggasher’s came to his end, but he is rumored to have been disappeared at the Sumerian sea.