The Padishah Emperor was the title of the hereditary rulers of the Imperium. They were also known as "Emperors of the Known Universe." The title of Emperor was taken by Sheuset Costin who became the head of House Corrino after the Battle of Corrin and used by the head of that House for more than 10,000 years. Since the House of Hajus Corrino, the title was called "Padishah."