Ancient Sumer

The Sumer left behind the oldest set of laws found so far - the Ur-Nammu code, which dates back to the 22nd - 21st century B.C.

An excerpt from the article 18 facts about ancient Sumer
Two clay tablets were found during the excavations at Nippur in 1902, and only three articles have been deciphered - the first, the fifth, and the tenth. It is not known what issues this code regulated, but we know it was a model for, among others, the famous stele of Hammurabi.