A "wheel turning sage king." In pre-Buddhist Indian tradition， this refers to a sagely， benevolent and capable ruler， who eminently handles the domain; somewhat of an ideal， mythical vision of the perfect king， who is able to rule by righteousness rather than by force. In Buddhism， a special meaning is implied， with this ruler possessing a buddha's enlightenment and abilities. In particular， there are four kings， who possess gold， silver， bronze and iron wheels respectively （cakravarti-ra^ja）.