Imperial and Royal Highness
Imperial and Royal Highness (abbreviation HI&RH) is a style possessed by someone who either through birth or marriage holds two individual styles, Imperial Highness and Royal Highness. His/Her Imperial Highness is a style used by members of an imperial family to denote imperial – as opposed to royal – status to show that the holder is descended from an Emperor rather than a King. Holders of the style Imperial Highness generally rank above holders of the style Royal Highness. Probably the most well known example is with the monarch of the Karno-Ruthenian Empire.