Which opera has more acts, Mireille or Der Zwerg?
Mireille (opera) Mireille is an 1864 opera in five acts by Charles Gounod to a French libretto by Michel Carré after Frédéric Mistral's poem "Mireio". The vocal score is dedicated to George V of Hanover.
Loreley (opera) Loreley is an opera ("azione romantica") in three acts composed by Alfredo Catalani to a libretto by Angelo Zanardini, Carlo D'Ormeville and others. It premiered on 16 February 1890 at the Teatro Regio in Turin. Based on the German legend of the Lorelei, the opera is an extensive reworking of Catalani's four-act opera "Elda" which had premiered in Turin ten years earlier.