The empire founded by Chandragupta Maurya over 2300 years ago covered a large region. It had several major cities, including the capital Pataliputra, as well as Taxila and Ujjain, which served as trade and administrative centers. Rural areas contained villages of farmers and herders. The empire's ruler, known as the emperor, needed many officials to govern the diverse territory and collect taxes. Ashoka, a famous emperor, promoted dhamma, or virtues, after being moved by the violence of war. He sent officials and erected inscriptions to spread messages of dhamma.