Narcís Oller i Moragas (Catalan pronunciation: [n??'siz u'?e]; 10 August 1846, in Valls – 26 July 1930, in Barcelona) was a Catalan writer, most noted for the novels La papallona (The Butterfly) which appeared with a foreword by Émile Zola in the French translation; his most well-known work L'Escanyapobres (The Usurer); and La febre d'or (Gold Fever) which is set in Barcelona during the period of promoterism.
He also translated the works of Tolstoy and Dumas.