The Akkadian Empire lost power after the reign of Naram-Sin, and eventually was invaded by the Guti from the Zagros Mountains. For half a century the Guti controlled Mesopotamia, especially the south, but they left few inscriptions, so they are not well understood. The Guti hold loosened on southern Mesopotamia, where the second dynasty of Lagash came into prominence. Its most famous ruler was Gudea, who left many statues of himself in temples across Sumer.