Nippur was one of the most important cities in the Sumerian world. Here was situated the shrine of the Lord of the gods, Enlil; here the king's name was spoken by Enlil, lord of the earth, calling him into existence as king, at the great shrine é-kur, the mountain-house where the god abode amongst men, and where kings did him honour.The site was in part excavated by an American expedition from 1889 to 1990, but much still remains to be done. The excavations yielded large quantities of tablets of which, there is reason to believe, not all have as yet been published. The first group, dating to the Third Dynasty of Ur, with which this study is concerned, were published in 1910 under the editorship of Professor Hilprecht, and consisted of 171 tablets and fragments, but not until last year did others of the Hilprecht Collection appear. A few have appeared elsewhere, so that, in all, about 400 tablets and fragments from Nippur are at present available for study. The collection now published for the first time at the end of this article adds thirty-seven more. These are considerably less than the number of tablets which have been published from other sites of the period of the Third Dynasty of Ur, such as Drehern, Umma, and Telloh, but they are sufficient for a review of Nippur at this period, such as is attempted here.