What Austro-Hungarian composer helped produce "Princess Flavia" and "New Moon"?
Princess Flavia Princess Flavia is a 1925 operetta in three acts based on Anthony Hope's novel "The Prisoner of Zenda", with book and lyrics by Harry B. Smith and music by Sigmund Romberg.
Duchess Maria Antonia of Bavaria Maria Antonia, Princess of Bavaria (18 July 1724 – 23 April 1780), Electress of Saxony, was a German composer, singer, harpsichordist and patron, known particularly for her operas "Il trionfo della fedeltà" (Dresden, summer 1754) and "Talestri, regina delle amazoni" (Nymphenburg Palace, February 6, 1760). She was also the Regent of Saxony in 1763-1768. Baptised "Maria Antonia Walpurgis Symphorosa", she was known as Maria Antonia.