Nippur (Sumerian: Nibru, often logographically recorded as 𒂗𒆤𒆠, EN.LÍL^KI, "Enlil City;" Akkadian: Nibbur) was one of the most ancient of all the Sumerian cities. It was the special seat of the worship of the Sumerian god Enlil, the "Lord Wind," ruler of the cosmos, subject to An alone.