Xanadu.

Picture - by the imperial summer villa, Xanadu (Cheng Du, Chengde).

Back in time, pretty long ago, lived a ruler in today's Mongolia named Kublai Khan. Kublai was the second son of Tolui and the grandson of Genghis. He was the one that preferred to stay, in Mongolia and part of today's China, this as the fifth Khagan (Great Khan), and the founder of the Yuan dynasty of China. Kublai was attracted by the abilities of tibethan monks as healers. He in 1253 made Drogön Chögyal Phagpa of the Sakya order a member of his entourage. Phagpa bestowed on Kublai and his wife Chabi, a tantric buddhist initiation.

Kublai had 4 sons. The eldest was fierce, in fact impossible to allow to stay in Earthly life. This is so! Thus, the second son of Kublai, carrying the name ”the one that does not bow to too much cruelty” killed his elder brother. This second son in line after that went on to build a monastery of kind, in the most eastern parts of  Tibet. His name could and should have been spelled 'mildness', but was more 'earthly' than that.  

He was the first Rinpoche of Tibethan buddhism. 

The place where this monastery was built - Xanadu - was on that exactly same spot of Earth, as is now placed Cheng Du (Chengde), the 'summer palace' of the Qing dynasty, built between 1703 – 1792.

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p.s. Kublais third son Zhenjin was the one to inherit Kublais

kingdom. And so he did.  d.s.