Between "The Devil and Kate" and "Martha" which has more acts?
The Devil and Kate The Devil and Kate, Op. 112, B.201, ("Čert a Káča" in Czech) is an opera in three acts by Antonín Dvořák to a Czech libretto by Adolf Wenig. It is based on a farce by Josef Kajetán Tyl, and the story also had been treated in the "Fairy Tales" of Božena Němcová. The first performance of the opera was at the National Theatre, Prague, on 23 November 1899, under Adolf Čech.
Lady Macbeth of the Mtsensk District (opera) Lady Macbeth of the Mtsensk District (Russian: "Леди Макбет Мценского уезда" , or "Ledi Makbet Mtsenskogo uyezda") is an opera in four acts and nine scenes by Dmitri Shostakovich, his Opus 29. The libretto, jointly written by Alexander Preys and the composer, is based on the novel of the same name by Nikolai Leskov. (The opera is incorrectly named "Lady Macbeth of Mtsensk" on several commercial CD and DVD recordings.)