Sin-leqi-unninni is traditionally credited with compiling the Standard Babylonian version of the Epic of Gilgamesh.
The Standard Babylonian epic is the best-known long form of the story. It was written in Akkadian cuneiform and assembled from older Sumerian and Babylonian traditions. Sin-leqi-unninni is usually described as its editor or compiler, rather than an author who invented every episode.
The attribution comes from ancient scholarly tradition and is not equivalent to a modern signed manuscript. The poem developed over centuries, with different versions, tablets, and recensions. The name therefore identifies the traditional compiler associated with the received Standard Babylonian form.
The famous opening, often translated as “He who saw the deep,” introduces a work concerned with kingship, friendship, mortality, and the limits of human achievement. Modern editions reconstruct the text from multiple ancient witnesses, including tablets from the library of Ashurbanipal.