The Battle Of the Monarchs: Can Cathrine Really Be Worthy Of The Title Great? Monarchy is rule by a king or queen. This one person can use it's overall power for good or evil. One very important monarch , probly the most powerful of all time, is Louis the XIV . Another very imporatnt monarch was Cathrine the great, who ruled during the mid-1700's. One could question if she was as succesful as , or even as known as louis the XIV. It is also a thought whether or not she is worthy enough to be compared to him. Both were very powerful , but who was the most powerful? Both Cathrine and Louis wanted to expand the border