Usually operas are not based on religious themes. You may be thinking of oratorios.
Calls for religious reform. Operas. Epic poems. Symphonies. Philosophical texts. Scientific articles.
avsav
Most operas begin with an overture, an orchestral introduction that includes many of the musical themes of the piece.
There are thousands of operas on hundreds of topics: this is like asking "what is a movie about." Popular themes are love, death, betrayal, war, and magic.
Penelope Ann Speedie has written: 'American operas on American themes by American composers' -- subject(s): Opera
Operas are not necessarily choral works or based on religious themes.Cantatas are.
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.
Calls for religious reform. Operas. Epic poems. Symphonies. Philosophical texts. Scientific articles.
avsav
Nightwish is not a religious band. Their music predominantly explores themes of fantasy, nature, and personal experiences rather than focusing on religious topics.
Most operas begin with an overture, an orchestral introduction that includes many of the musical themes of the piece.
Stained glass is decorative, and when it is well done it is beautiful. It is most often seen in churches and cathedrals, but it does not have to be based on religious themes.
Oratorios are sacred operas, so they are traditionally performed in churches. However, being magnificent compositions that utilise orchestra, choir and soloists, they are performed as concert pieces as well.
There are thousands of operas on hundreds of topics: this is like asking "what is a movie about." Popular themes are love, death, betrayal, war, and magic.
Johann Strauss
psychological, philosophical, and religious
Penelope Ann Speedie has written: 'American operas on American themes by American composers' -- subject(s): Opera