Maria Callas was a Greek-American soprano who is considered one of the greatest opera singers of all time. She was particularly renowned for her interpretations of Verdi and Puccini heroines.

Luciano Pavarotti was an Italian tenor who achieved worldwide fame for his exceptional vocal abilities and his performances in popular operas such as (\La\ Bohème) and (\Turandot).

Marilyn Horne was an American mezzo-soprano who was renowned for her versatility and her ability to sing a wide range of roles, including Carmen, Amneris in Verdi's (\Aida), and Octavian in Strauss's (\Der\ Rosenkavalier).

Samuel Ramey is an American bass-baritone who has performed in major opera houses around the world. He is particularly known for his interpretations of villains and antiheroes, such as Mephistopheles and Scarpia in Puccini's (\Tosca).

Mirella Freni was an Italian soprano who was renowned for her beautiful voice and her ability to convey deep emotions on stage. She was particularly admired for her interpretations of Puccini heroines, including Cio-Cio San in (\Madama\ Butterfly) and Mimi in (\La\ Bohème).

Jon Vickers was a Canadian tenor who was renowned for his powerful voice and his dramatic intensity. He was particularly admired for his interpretations of heroic roles, such as Otello and Lohengrin.

Dawn Upshaw is an American mezzo-soprano who is known for her versatility and her ability to sing a wide range of repertoire, from Baroque to contemporary. She is particularly admired for her performances in contemporary operas, such as Philip Glass's (\Einstein\ on\ the\ Beach) and John Adams's (\Nixon\ in\ China).

Kurt Moll was a German bass who was renowned for his deep, resonant voice and his ability to convey authority and gravitas on stage. He was particularly admired for his interpretations of Sarastro and Gurnemanz.

Birgit Nilsson was a Swedish soprano who was renowned for her powerful voice and her dramatic intensity. She was particularly admired for her interpretations of Wagnerian heroines, such as Brünnhilde in (\Der\ Ring\ des\ Nibelungen), and for her portrayal of Salome.

Alfredo Kraus was a Spanish tenor who was renowned for his beautiful voice and his elegant phrasing. He was particularly admired for his interpretations of Italian opera roles, such as the Duke of Mantua in (\Rigoletto) and Rodolfo in (\La\ Bohème).

Régine Crespin was a French mezzo-soprano who was renowned for her beautiful voice and her dramatic intensity. She was particularly admired for her interpretations of French opera roles, such as Carmen and Manon.

Hans Hotter was a German bass-baritone who was renowned for his powerful voice and his dramatic intensity. He was particularly admired for his interpretations of Wagnerian roles, such as Wotan in (\Der\ Ring\ des\ Nibelungen) and Amfortas in (\Parsifal).

Leontyne Price was an American soprano who was renowned for her beautiful voice and her regal stage presence. She was particularly admired for her interpretations of Verdi heroines, such as Aida and Violetta in (\La\ Traviata).

Sergei Lemeshev was a Russian tenor who was renowned for his beautiful voice and his elegant phrasing. He was particularly admired for his interpretations of Russian opera roles, such as Lensky in (\Eugene\ Onegin) and Aleko in (\Aleko).

Cecilia Bartoli is an Italian mezzo-soprano who is renowned for her beautiful voice and her exquisite technique. She is particularly admired for her interpretations of Baroque opera roles, such as Cleopatra in (\Giulio\ Cesare) and Orfeo in (\Orfeo).