Nippur was the prominent and capital city of the Akkadian Empire. According to an ancient tradition, Akkadian Kings are housed in the Palace of Nippur. Nippur was a chief trading state, connected in trade to Babylon, Persia, Greece and the Indus Valley. Nippur had a strong defense wall, with heavily guarded entrance. The Akkadian weren't bound to education and history, possessing a war based approach on conquering the world. About 40,000 clay tablets have been found from the ruins of Nippur, it's likely that the Akkadian began leaning towards literature, later in some time.