The largest contiguous empire the world has ever seen. People think the Roman or Greek empire was big. The Mongul empire was much bigger in Square miles. Would've probably included all of Europe too but for a stroke of good luck on their part.
Four Mongol khanates Sadamasa Cengiz'den sonra Mogol İmparatorluğunun ayrildıği 4 hanlık Karakorum is the original Mongol capital. Shangdu is Xanadu. Dadu or Khanbaliq is Beijing. The Khanate of Persia is the Ilkhanate.