Johann Strauss
German composer Richard Wagner's "Der Ring des Nibelungen", or "The Ring of the Nibelung" (also known as "The Ring Cycle", is a series of four epic music dramas. The operas are loosely based on episodes and characters from Norse mythology, and were composed from 1848 to 1874. The titles of the four individual operas are Das Rheingold (The Rhinegold), Die Walk
Most of Giuseppe Verdi's operas were published by Casa Ricordi, a prominent music publishing company based in Milan, Italy. Casa Ricordi played a significant role in promoting Verdi's works and supporting his career as a composer.
Usually operas are not based on religious themes. You may be thinking of oratorios.
Operas are not necessarily choral works or based on religious themes.Cantatas are.
No, Shakespeare never wrote any operas. However, many operas have used Shakespeare's works as inspiration. For a full list of operas based off of Shakespeare's works, check out the related link.
Aaron Copland was the composer of the 20th century, known for using folk based fiddle tunes.
Mozart wrote The Marriage of Figaro (Le Nozze di Figaro). It is one of the two operas in the standard repertoire featuring Figaro as a character; the other is The Barber of Seville (Il Barbiere di Siviglia) by Gioacchino Rossini. Both of the operas are based on plays by Pierre Beaumarchais. Giovanni Paisiello made the Barber into an opera before Rossini did, but it hasn't had the success that Rossini's had. Mozart is the only composer to write operas in the standard repertoire in more than one language. The Marriage of Figaro, Don Giovanni, and Cosi Fan Tutte are sung in Italian, while The Magic Flute (Die Zauberflote) and The Abduction from the Seraglio (Die Entfuhrung Aus Dem Serail) are sung in German. Mozart, in total, wrote twenty-two operas, but only those five are considered to be part of the standard repertoire; La Clemenza di Tito, which Mozart hadn't completed when he died and his pupil Sussmayr finished, is sometimes performed, as is Idomeneo.
Verdi
No, the themes do not have to be religious for a work to be an opera or a cantata. Operas have various themes including love, romance, kidnapped children raised by others, etc.
RENT is based on the opera La Boheme by Puccini.
Chinese opera like western opera evolved and was / is based on fact, fiction, folklore etc. See the links below
Bertolt Brecht Bertolt Brecht, a German dramatist