XIR326620 The \'Champ de Mai\' or Emperor Napoleon I swearing fidelity to the Constitutions on 1st June 1815 (engraving) (b/w photo) Additional act of 22nd April 1815 to the Constitutions of the Empire (engraving) (b/w photo) by French School, (19th century); Bibliotheque Nationale, Paris, France; (add.info.: additional act of 22nd April 1815 written mainly by Benjamin Constant (1767-1830); at Lyon Napoleon issued an edict dissolving the existing chambers and ordering the convocation of a national mass meeting or Champ de Mai; Hundred Days; 100 Days;); French, out of copyright.