Tartarian Empire refers to a group of pseudohistorical conspiracy theories, including ideas of a "hidden past" and "mud floods" which originated as pseudoscientific Russian nationalism.
Tartary or Tartaria is a historical name for Central Asia and Siberia. Conspiracy theories assert that Tartary or the Tartarian Empire was a lost civilization with advanced technology and culture. This ignores the well-documented history of Asia, which Tartary refers to.[1] In the present day, the Tartary region covers a region spanning from central Afghanistan to northern Kazakhstan, as well as areas in present Mongolia, China, and the Russian Far East in "Chinese Tartary".