Uronarti was an ancient Egyptian settlement located on an island in the Nile above (to the South of) the Second Cataract. It is well known for its triangular-shaped fortress, constructed between the reigns of Middle Kingdom rulers Senusret I and Senusret III, in the nineteenth century BCE. The site was one of several established in Nubia during this period as Egyptians sought to expand their influence to the south. The fortress was excavated by George Reisner and the site has not been submerged by Lake Nasser created by the Aswan Dam in 1964.