Don Carlos is a five-act grand opera composed by Giuseppe Verdi to a French language libretto by Camille du Locle and Joseph Méry, based on the dramatic play Don Carlos, Infant von Spanien (Don Carlos, Infante of Spain) by Friedrich Schiller. When performed in Italian, the opera is called Don Carlo. The story is based on conflicts in the life of Carlos, Prince of Asturias (1545–1568), after his betrothed Elisabeth of Valois was married instead to his father Philip II of Spain as part of the peace treaty ending the Italian War of 1551-1559 between the Houses of Habsburg and Valois. It was commissioned and produced by the Théâtre Impérial de l’Opéra (Paris Opera) and premiered at the company's theatre, the Salle Le Peletier, on 11 March 1867.

Over the following twenty years, cuts and additions were made to the opera, resulting in a number of versions being available to directors and conductors. No other Verdi opera exists in so many versions. At its full-length (including the ballet and the cuts made before the first performance), it contains about four hours of music and is Verdi's longest opera.

Samuel Edward Ramey (born March 28, 1942 in Colby, Kansas) is an American operatic bass with a long, distinguished career. At the height of his career, he was greatly admired for his range and versatility, having possessed a sufficiently accomplished bel canto technique to enable him to sing the music of Handel, Mozart, Rossini, yet power enough to handle the more overtly dramatic roles written by Verdi and Puccini.

He married his third wife, soprano Lindsey Larsen, on June 29, 2002.

Samuel Ramey is a 1960 graduate of Colby High School in the town of Colby, Kansas. He studied music in high school and in college at Kansas State University, as well as at Wichita State with Arthur Newman. In college at Kansas State, Ramey was a member of the Kappa Sigma Fraternity. After further study in Central City (where he was in the chorus of Don Giovanni in 1963, with Norman Treigle in the title role) and as an apprentice with the Santa Fe Opera, he went to New York where he worked for an academic publisher before he had his first breakthrough at the New York City Opera, debuting on March 11, 1973 singing the role of Zuniga in the 1875 Bizet opera Carmen, after which, among other roles, he took over the Faustian devils in Gounod's Faust and Boito's Mefistofele left empty by the early death of Treigle.

Luciano Pavarotti, Cavaliere di Gran Croce OMRI (12 October 1935 – 6 September 2007) was an Italian operatic tenor, who also crossed over into popular music, eventually becoming one of the most commercially successful tenors of all time. He made numerous recordings of complete operas and individual arias, and established himself as one of the finest tenors of the 20th century. He was one of The Three Tenors and became well known for his televised concerts and media appearances. Pavarotti was also noted for his charity work on behalf of refugees and the Red Cross, amongst others.

Pavarotti began his professional career as a tenor in 1961 in Italy. That same year, he made his first international appearance in La traviata in Belgrade, Yugoslavia. He sang in opera houses in addition to Italy, in the Netherlands, Vienna, London, Ankara, Budapest and Barcelona. The young tenor earned valuable experience and recognition while touring Australia at the invitation of soprano Joan Sutherland in 1965. He made his United States debut in Miami soon afterwards, also on Sutherland's recommendation. His position as a leading lyric tenor was consolidated in the years between 1966 and 1972, during which time he first appeared at Milan's La Scala and other major European houses. In 1968, he debuted at New York City's Metropolitan Opera as Rodolfo in Puccini's La bohème. At the Met in 1972, in the role of Tonio in Donizetti's La fille du régiment he earned the title "King of the high Cs" when he sang the aria "Ah mes amis ... pour mon âme". He gained worldwide fame for the brilliance and beauty of his tone, especially into the upper register. He was at his best in bel canto operas, pre-Aida Verdi roles and Puccini works such as La bohème, Tosca and Madama Butterfly. The late 1970s and 1980s saw Pavarotti continue to make significant appearances in the world's foremost opera houses.

Daniela Dessì Born May 14, 1957, in Genoa, Italy is an Italian lirico-spinto soprano.

Daniela Dessì completed her singing studies at the Conservatory of Parma and the Accademia Chigiana of Siena. After having won the first prize at the International Competition organized by RAI TV in 1980, she had her debut with the comic opera La serva padrona by Pergolesi. Her international career has taken her to the best Opera theatres, singing under the direction of the greatest orchestra conductors, such as Riccardo Muti, Claudio Abbado, James Levine and others.

Her season 2008-2009 began with Tosca in Florence (where she gave an encore of "Vissi d'arte" - it has been 52 years since this happened to Renata Tebaldi), then at the Verdi Theatre in Trieste, Adriana Lecouvreur in Palermo, La fanciulla del West in Seville,Manon Lescaut in Warsaw, Madama Butterfly in Hanover and Aida in Verona and Cagliari, and she closes the season in Barcelona (Turandot); in January 2009 she opened the season of recital at La Scala.

Riccardo Muti, Cavaliere di Gran Croce OMRI (Italian pronunciation: [rikˈkardo ˈmuːti]; born 28 July 1941) is an Italian conductor and music director of the Chicago Symphony Orchestra.

Muti was born in Naples but spent his early childhood in Molfetta, near Bari, in the long region of Apulia on Italy's southern Adriatic coast. His father was a doctor in Molfetta and an amateur singer; his mother, a Neapolitan, was a professional singer. As wryly explained in the conductor's 2010 autobiography, it was a family pattern for the children to be born in Naples.

Muti graduated from Liceo classico (Classical Lyceum) Vittorio Emanuele II in Naples, then studied piano at the Conservatory of San Pietro a Majella under Vincenzo Vitale; here Muti was awarded a diploma cum laude. He was subsequently awarded a diploma in Composition and Conducting by the Conservatory "Giuseppe Verdi", Milan, where he studied with the composer Bruno Bettinelli and the conductor Antonino Votto. He has also studied composition with Nino Rota, whom he considers a mentor. He was unanimously awarded first place by the jury of the "Guido Cantelli" competition for conductors in Milan in 1967 and became, the next year, principal conductor and music director of the Maggio Musicale Fiorentino, a post he held for eleven years.