Jemdet Nasr (Arabic: جمدة نصر‎) is a tell or settlement mound in Babil Governorate (Iraq) that is best known as the eponymous type site for the Jemdet Nasr period (3100–2900 BC). The site was first excavated in 1926 by Stephen Langdon, who found proto-cuneiform clay tablets in a large mudbrick building thought to be the ancient administrative centre of the site. A second season took place in 1928, but this season was very poorly recorded. Subsequent excavations in the 1980s under British archaeologist Roger Matthews were, among other things, undertaken to relocate the building excavated by Langdon.