Anita Rachvelishvili, the once-blazing mezzo-soprano, has struggled with vocal problems since her pregnancy two years ago.

The church’s urgent and eloquent version of Handel’s classic oratorio remains an inspired communal rite.

The ailing conductor was to have led the Staatskapelle Berlin in Brahms’s symphonies at Carnegie Hall. Yannick Nézet-Séguin jumped in.

In 1987, “Nixon in China” meditated on what was then recent history, depicting Kissinger as a smooth diplomat with a brutal side.

Callas would have turned 100 on Dec. 2. She and her flash of a career remain beacons of artistic integrity and profundity.

Its stylistic range, precision and passion have made the group one of contemporary music’s indispensable ensembles.

Under Dima Slobodeniouk, the orchestra played works by Holst and Ligeti and, for the first time, Julia Perry’s somber “Stabat Mater.”

Her high notes emerging like shafts of sunlight, Davidsen is playing the title role in Janacek’s “Jenufa” at the struggling Lyric Opera of Chicago.

Starring Ailyn Pérez, Daniel Catán’s heavily perfumed “Florencia en el Amazonas,” from 1996, is the company’s first work by a Latin American composer.

The group, which celebrated its birthday on Friday at Carnegie Hall, changed music with its open-eared and open-minded approach.