Saverio Mercadante's rarely performed opera Virginia from Wexford Opera Festival in Ireland. Clive Barda/Courtesy of Wexford Festival Opera hide caption

itoggle caption Clive Barda/Courtesy of Wexford Festival Opera

Katia Pellegrino performs the grueling role of Norma in this concert production of Bellini's opera. Wojciech Grzedzinski hide caption

itoggle caption Wojciech Grzedzinski

Elvira (Désirée Rancatore) thinks her fiance is cheating on her -- but he's really saving the exiled Queen. Zeininger/Wiener Staatsoper hide caption

itoggle caption Zeininger/Wiener Staatsoper

More than 30 years after her death in 1977, Maria Callas' voice continues to thrill and divide fans and experts. EMI Classics hide caption

itoggle caption EMI Classics