Who were the kings of the Sumerian Empire and what were their contributions?

The Sumerian civilization is one of the earliest civilizations in human history and was located in Mesopotamia, in what is now Iraq. The civilization was ruled by a series of kings, and the contributions of these kings helped shape the course of human history. Some of the most notable kings of the Sumerian Empire include:

• Sargon of Akkad, who established the Akkadian Empire and conquered much of Sumer
• Hammurabi, who created a law code that became the basis for many legal systems
• Gilgamesh, who was the subject of one of the world's oldest surviving works of literature, the Epic of Gilgamesh
• Ur-Nammu, who founded the Third Dynasty of Ur and implemented reforms that helped to establish a stable and prosperous society
• Shulgi, who was one of the longest-reigning kings of Sumer and oversaw significant cultural and economic growth

Their contributions include the development of writing, the wheel, irrigation, agriculture, and many other innovations that would shape the course of human history. They also built some of the earliest known cities, including Ur, Uruk, and Eridu, which were centers of trade, religion, and culture.