
Karakorum (Classical Mongolian: {MongolUnicode|ᠬᠠᠷᠠᠬᠣᠷᠣᠮ} Qara Qorum, Khalkha Mongolian: Хархорум Kharkhorum) was the capital of the Mongol Empire in the 13th century, and of the Northern Yuan in the 14–15th centuries. Its ruins lie in the northwestern corner of the Övörkhangai Province of Mongolia, near today`s town....
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http://en.wikipedia.org/wiki/Karakorum

ancient capital of the Mongol empire, whose ruins lie on the upper Orhon River in north-central Mongolia.[1 related articles]
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http://www.britannica.com/eb/a-z/k/11

a ruined city in central Mongolian People's Republic: capital of the Mongol Empire in the 13th century.
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https://www.infoplease.com/dictionary/karakorum
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