The term Bayreuth canon is therefore sometimes glossed as meaning the composer's mature operas.

It is also the only one of Wagner's mature operas in which there are no supernatural or magical powers or events.

Mozart's mature operas would have been impossible without Gluck's works as models.

Again, like Janacek's other mature operas, "Makropulos" is concentrated in the extreme.

It was only one of a few of Donizetti's "mature operas which appear never to have been performed elsewhere after their first runs".

The mature operas of Mozart were among the best-known works that Zinzendorf witnessed at their first performances.

Of Mozart's mature operas, its jokes, allusions and conventions translate least well to our own times.

L'Orfeo was not the first opera, but the first mature opera, or one that realized all of its potential.

This is often considered his first "mature" opera, despite the fact that he was 67 when it was premiered.

The least known of Puccini's mature operas, the composer continued to work at revising it until his death.