Renowned for her astounding range, the Italian mezzo-soprano's singing is a source of joy for adoring Opera fans. For more than four decades, Bartoli has remained one of the most dazzling voices in ...

A star mezzo-soprano, Bartoli also runs a festival and an opera house at an age when others start to retire. And she’s not slowing down. Credit... Supported by By Joshua Barone Reporting from Salzburg ...