Genghis Khan: Founder and first Great Khan of the Mongol Empire which became the largest contiguous empire in history after his death.
Pax Mongolica: A period during which trade flourished thanks to political stability provided by unified rule under the Mongols.
Yuan Dynasty: Dynasty in China ruled by Kublai Khan, grandson of Genghis Khan; it represents part of what was once known as "The Great Mongolian Empire."