Which one is based on Hernani, Der Schauspieldirektor or Ernani?
Der Schauspieldirektor Der Schauspieldirektor ("The Impresario"), K. 486, is a comic "singspiel" by Wolfgang Amadeus Mozart, set to a German libretto by Gottlieb Stephanie, an Austrian "Schauspieldirektor". Originally, it was written because of "the imperial command" of the Holy Roman Emperor Joseph II who had invited 80 guests to a private luncheon.
Erckmann-Chatrian Erckmann-Chatrian was the name used by French authors Émile Erckmann (1822–1899) and Alexandre Chatrian (1826–1890), nearly all of whose works were jointly written.