Correspondence of the Kings of Ur
The Correspondence of the Kings of Ur (CKU), also known as the Royal Correspondence of Ur, is a collection of 24 literary letters written in the Sumerian language and attributed to kings of the Ur III period, 2048–1940 BCE (2112–2004 middle chronology). They are known primarily from copies dating to the Old Babylonian period, ca.
Source: Wikipedia — Correspondence of the Kings of Ur (CC BY-SA 4.0)