The Khwarazmian or Khwarezmian Empire (English: ), was a Turko-Persian Sunni Muslim empire that ruled large parts of present-day Central Asia, Afghanistan, and Iran in the approximate period of 1077 to 1231, first as vassals of the Seljuk Empire and the Qara Khitai (Western Liao dynasty), and later as independent rulers, up until the Mongol conquest in the 13th century.