Although the earliest existing copy comes from the Old Babylonian Period (ca. 1800 BCE), the Sumerian language text Curse of Agade was probably composed during the period of the Ur III kings (ca. 2112–2004 BCE). The text is difficult to classify, but most scholars consider it a literary-historiographic document written to explain the rise and fall of the Akkadian Empire, the first world state, created by Sargon of Akkad (or Agade; ca. 2334 BCE). By the time this text was written, the city of Agade had been abandoned, never to rise again. In fact, its location is still a mystery to modern scholars.