In the pitch-dark auditorium of Rome’s Teatro Costanzi, a high-pitched lament floated from the top galleries. Dozens of flashlights snapped on, their beams crisscrossing crazily, seeking the source of the sound.

The shafts of light homed in on a spectral figure — a slim, dark-haired woman dressed in white, moving at a funereal pace and plaintively singing. In the audience, 130-odd children, ages 8 to 10, let loose squeals, some gasps, and one “it’s not real.” Several called out “Emma, Emma.”

The children had just been told that the Costanzi, the capital’s opera house, had a resident phantom. No, not that one. This was said to be the spirit of Emma Carelli, an Italian soprano who managed the theater a century ago, and loved it so much that she was loath to leave it, even in death.

“The theater is a place where strange things happen, where what is impossible becomes possible,” Francesco Giambrone, the Costanzi’s general manager, told the children Saturday afternoon when they arrived to participate in a get-to-know-the-theater-sleepover.

Music education ranks as a low priority in Italy, the country that invented opera and gave the world some of its greatest composers. Many experts, including Mr. Giambrone, say their country has rested on its considerable laurels rather than cultivate a musical culture that encourages students to learn about their illustrious heritage.