Answer
The correct answer is **Monsieur Beaucaire**. Set in Bath, England, this charming operetta is based on the 1900 novel of the same name by Booth Tarkington. The story follows the adventures of the Duc de Chartres, who disguises himself as a commoner to win the heart of a beautiful Englishwoman. With its delightful music and memorable characters, Monsieur Beaucaire is a beloved classic of the operetta genre.