What is the lasting historical legacy of the Mongol Empire?

Question

ok so the lasting historical legacy wouldn't have much to do with the great law and the fact that Genghis Khan united everyone under that and declared religious freedom... which was the first time that religious freedom was allowed

Answer 1

Key periods in the development of both China and India.
The Khans ruled in China during the 1200s and 1300s.
In India it was the Mughals - a variation of the Mongols -
in the 1500s thru the 1700s. The Taj Mahal was built by a Mughal ruler in the 1600s.