What Christmas opera did Gian Carlo Menotti write?

Apart from opera he wrote several ballets and numerous choral works.

Gian Carlo Menotti was born on July 7, 1911 and died on February 1, 2007. Gian Carlo Menotti would have been 95 years old at the time of death or 100 years old today.

Gian Carlo Menotti was born on July 7, 1911.

Gian Carlo Menotti died on February 1, 2007 at the age of 95.

Gian Carlo Menotti was born on July 7, 1911.