#Emperor  the male ruler of an empire
  supertype:  sovereign__crowned_head__crownedhead__monarch  a nation's ruler or head of state usually by hereditary right
  instance:  Francis_Joseph_I  Genghis_Khan  Haile_Selassie  Michinomiya_Hirohito  Justinian_the_Great  Kublai_Khan  Meiji_Tenno  Montezuma_II  Napoleon_Bonaparte  Napoleon_III  Shah_Jahan
  subtype:  Empress  a woman Emperor or the wife of an Emperor
     instance:  Catherine_I  Catherine_II__Catherine__Catherine_the_Great
  subtype:  Holy_Roman_Emperor  sovereign of the Holy Roman Empire
     instance:  Charlemagne__Charles_I__Charles_the_Great  Charles_I__Charles_II__Charles_the_Bald  Ferdinand_I  Ferdinand_II  Ferdinand_III  Emperor_Francis_II__Francis_II  Frederick_Barbarossa__Frederick_I__Barbarossa  Frederick_II  Otto_I__Otho_I__Otto_the_Great
  subtype:  Kaiser  the Holy Roman Emperors or the Emperors of Austria or Germany until 1918
     instance:  Wilhelm_II__Kaiser_Wilhelm
  subtype:  mikado__tenno  (archaic) the emperor of Japan; when regarded as a religious leader the emperor is called tenno
  subtype:  Roman_Emperor__Emperor_of_Rome  sovereign of the Roman Empire
     instance:  Marcus_Aurelius_Antoninus__Antoninus__Aurelius__Marcus_Aurelius__Marcus_Annius_Verus  Antonius_Pius  Augustus__Gaius_Octavianus__Gaius_Julius_Caesar_Octavianus__Octavian  Caligula__Gaius__Gaius_Caesar  Tiberius_Claudius_Drusus_Nero_Germanicus__Claudius__Claudius_I  Constantine_the_Great__Constantine__Constantine_I  Decius  Domitian__Titus_Flavius_Domitianus  Hadrian__Publius_Aelius_Hadrianus__Adrian  Nero_Claudius_Caesar_Drusus_Germanicus__Nero__Lucius_Domitius_Ahenobarbus  Marcus_Cocceius_Nerva__Nerva  Tiberius_Claudius_Nero_Caesar_Augustus__Tiberius  Titus_Flavius_Vespasianus__Titus  Trajan__Marcus_Ulpius_Traianus  Vespasian__Titus_Flavius_Sabinus_Vespasianus

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