After the fall of Dʿmt during the fourth century BC, the Ethiopian plateau came to be dominated by smaller successor kingdoms. In the first century AD, the Kingdom of Aksum emerged in what is now Tigray and Eritrea. According to the medieval ''Book of Axum'', the kingdom's first capital, Mazaber, was built by Itiyopis, son of Cush. Aksum would later at times extend its rule into Yemen on the other side of the Red Sea. The Persian prophet Mani listed Axum with Rome, Persia, and China as one of the four great powers of his era, during the 3rd century.