The grandson of Genghis Khan, Kublai Khan was a Mongol emperor who founded China’s Yuan Dynasty and became the first Yuan emperor in 1271. In 1279, he completed his grandfather’s conquest of China by overthrowing the Sung dynasty. He promoted economic prosperity by rebuilding the Grand Canal, repairing public granaries, extending highways, and encouraging foreign commerce. His magnificent capital at Cambuluc—now Beijing—was visited by several Europeans, including what notable figure? Discuss