Xanadu
来自Big Physics
alteration of Shang-tu, the name of an ancient city in what is now the Inner Mongolia region of China, as portrayed in Coleridge's poem Kubla Khan (1816).
wiktionary
From Mandarin 上都(Shàngdū). The first Romanized form comes from Marco Polo's writings in Italian as Shan-Du. In 1617, Purchas his Pilgrimage[…] by Samuel Purchas was published in London, containing the phrase “In Xamdu did Cublai Can build a stately Palace” on page 472. This was the inspiration for Coleridge's poem which uses the spelling Xanadu.
etymonline
Xanadu
Mongol city founded by Kublai Khan, 1620s, Englished form of Shang-tu. Sense of "dream place of magnificence and luxury" derives from Coleridge's poem (1816).