What are The Bohemian Girl and Der Kaiser von Atlantis?
The Bohemian Girl: The Bohemian Girl is a ballad opera composed by Michael William Balfe with a libretto by Alfred Bunn. Der Kaiser von Atlantis: Der Kaiser von Atlantis oder Die Tod-Verweigerung ("The Emperor of Atlantis or The Disobedience of Death") is a one-act opera by Viktor Ullmann with a libretto by Peter Kien.
The Bohemian Girl is a ballad opera