Louis the Pious (also known as Louis I, Louis the Fair, an Louis the Debonaire, German: Ludwig der Fromme, French: Louis le Pieux or Louis le Débonnaire, Italian: Luigi il Pio or Ludovico il Pio, Spanish: Luis el Piadoso or Ludovico Pío) (778 – 20 June 840) was Holy Roman Emperor and King of the Franks from 814 to his death in 840.