Edgar is an operatic dramma lirico in three acts (originally four acts) by Giacomo Puccini to an Italian libretto by Ferdinando Fontana, freely based on the play in verse La Coupe et les lèvres by Alfred de Musset. The first performance was given at the Teatro alla Scala in Milan on 21 April 1889 but the opera was not a success. Puccini repeatedly revised it until a 1905 performance in Buenos Aires, before declaring the work irredeemable, describing it as "warmed-up soup". It is still occasionally performed, including a 2005 recording by the Orchestra dell'Accademia Nazionale di Santa Cecilia conducted by Alberto Veronesi and featuring Plácido Domingo. This recording was described by Gramophone as "a tasty meal".

Gianni Schicchi (Italian pronunciation: [ˈdʒanni ˈskikki]) is a comic opera in one act by Giacomo Puccini to an Italian libretto by Giovacchino Forzano, composed in 1917–18. The libretto is based on an incident mentioned in Dante's Divine Comedy. The work is the third and final part of Puccini's Il trittico (The Triptych) – three one-act operas with contrasting themes, originally written to be presented together. Although it continues to be performed with one or both of the other trittico operas, Gianni Schicchi is now more frequently staged either alone or with short operas by other composers. The aria "O mio babbino caro" is one of Puccini's best known, and one of the most popular arias in opera. Puccini had long considered writing a set of one-act operas which would be performed together in a single evening, but faced with a lack of suitable subjects and opposition from his publisher, he repeatedly put the project aside. However, by 1916 Puccini had completed the one-act tragedy Il tabarro and, after considering various ideas, he began work the following year on the solemn, religious, all-female opera Suor Angelica. Gianni Schicchi, a comedy, completes the triptych with a further contrast of mood. The score combines elements of Puccini's modern style of harmonic dissonance with lyrical passages reminiscent of Rossini, and it has been praised for its inventiveness and imagination. When Il trittico premiered at New York's Metropolitan Opera in December 1918, Gianni Schicchi became an immediate hit, while the other two operas were received with less enthusiasm. This pattern was broadly repeated at the Rome and London premieres and led to commercial pressures to abandon the less successful elements. Although on artistic grounds Puccini opposed performing the three operas except as the original triptych, by 1920 he had given his reluctant consent to separate performances. Gianni Schicchi has subsequently become the most-performed part of Il trittico and has been widely recorded.

Il tabarro (The Cloak) is an opera in one act by Giacomo Puccini to an Italian libretto by Giuseppe Adami, based on Didier Gold's play La houppelande. It is the first of the trio of operas known as Il trittico. The first performance was given on 14 December 1918 at the Metropolitan Opera in New York City.

La bohème ( LAH boh-EM, Italian: [la boˈɛm]) is an opera in four acts, composed by Giacomo Puccini between 1893 and 1895 to an Italian libretto by Luigi Illica and Giuseppe Giacosa, based on Scènes de la vie de bohème (1851) by Henri Murger. The story is set in Paris around 1830 and shows the Bohemian lifestyle (known in French as "la bohème") of a poor seamstress and her artist friends. The world premiere of La bohème was in Turin on 1 February 1896 at the Teatro Regio, conducted by the 28-year-old Arturo Toscanini. Since then, La bohème has become part of the standard Italian opera repertory and is one of the most frequently performed operas worldwide. In 1946, 50 years after the opera's premiere, Toscanini conducted a commemorative performance of it on radio with the NBC Symphony Orchestra. A recording of the performance was later released by RCA Victor on vinyl record, tape and compact disc. It is the only recording ever made of a Puccini opera by its original conductor.

La fanciulla del West (The Damsel of the West) is an opera in three acts by Giacomo Puccini to an Italian libretto by Guelfo Civinini and Carlo Zangarini, based on the 1905 play The Girl of the Golden West by the American author David Belasco. Fanciulla followed Madama Butterfly, which was also based on a Belasco play. The opera has fewer of the show-stopping highlights that characterize Puccini's other works, but is admired for its impressive orchestration and for a score that is more melodically integrated than is typical of his previous work. Fanciulla displays influences from composers Claude Debussy and Richard Strauss, without being in any way imitative. Similarities between the libretto and the work of Richard Wagner have also been found though some attribute this more to the original plot of the play, and have asserted that the opera remains quintessentially Italian. At its première, Puccini declared La fanciulla del West to be the greatest composition of his career as a composer. In 1910, its highly publicised first performance at the Metropolitan Opera in New York City was immensely popular with audiences. However, much to the composer's disappointment, it received a less than positive reaction from American critics who felt the composer failed to effectively integrate an American aesthetic into the opera's score. The opera was widely performed internationally in the three years following the premiere for performances in cities throughout the United States, Europe, and South America. However, critical reaction to the work was largely negative internationally with the exception of critics in Italy at this time in history. After 1913, stagings of La fanciulla del West during the early and mid-20th century were more infrequent; although the opera has never left the performance repertoire. While overall public reception of the work has remained mixed, critical assessment of the opera underwent a reversal among Puccini scholars beginning in the late 20th century. Despite the plot being a source of significant criticism, the majority of published writers on Puccini and his music in the late 20th century and 21st century deem La fanciulla del West Puccini's magnum opus, particularly lauding its craftsmanship. Its critical reassessment coincided with an increase of performances of the opera at opera houses internationally during the late 20th and 21st centuries. Today performances of the opera are not rare, but the work is still not as frequently programmed as Puccini's other mature operas, such as La bohème and Tosca. In 2006, American philanthropist Bruce Kovner donated a large collection of original manuscripts to the Juilliard School in New York City, including Puccini's manuscript for La fanciulla del West.

La rondine (The Swallow) is an opera in three acts by Giacomo Puccini to an Italian libretto by Giuseppe Adami, based on a libretto by Alfred Maria Willner and Heinz Reichert. It was first performed at the Grand Théâtre de Monte Carlo (or the Théâtre du Casino) in Monte Carlo on 27 March 1917.

Le Villi (The Willis or The Fairies) is an opera–ballet in two acts (originally one) composed by Giacomo Puccini to an Italian libretto by Ferdinando Fontana, based on the short story "Les Willis" by Jean-Baptiste Alphonse Karr. Karr's story was in turn based in the Central European legend of the Vila, also used in the ballet Giselle. The opera, in its original one-act version, premiered at Milan's Teatro Dal Verme, on 31 May 1884. A performance typically lasts 64 minutes.

Madama Butterfly (Italian pronunciation: [maˈdaːma ˈbatterflai]; Madame Butterfly) is an opera in three acts (originally two) by Giacomo Puccini, with an Italian libretto by Luigi Illica and Giuseppe Giacosa. The Schickling catalog number is SC 74. It is based on the short story "Madame Butterfly" (1898) by John Luther Long, which, in turn, was based on stories told to Long by his sister Jennie Correll, and on the semi-autobiographical 1887 French novel Madame Chrysanthème by Pierre Loti. Long's version was dramatized by David Belasco as the one-act play Madame Butterfly: A Tragedy of Japan, which, after premiering in New York in 1900, moved to London, where Puccini saw it in the summer of that year. The original version of the opera, in two acts, had its premiere on 17 February 1904 at La Scala in Milan. It was poorly received, despite having such notable singers as soprano Rosina Storchio, tenor Giovanni Zenatello and baritone Giuseppe De Luca in lead roles. This was due in part to a late completion by Puccini, which gave inadequate time for rehearsals. Puccini revised the opera, splitting the second act in two, with the Humming Chorus as a bridge to what became Act III, and making other changes. Success ensued, starting with the first performance on 28 May 1904 in Brescia.

Manon Lescaut (Italian: [maˈnɔn leˈsko]) is an Italian-language opera in four acts composed by Giacomo Puccini between 1889 and 1892 to a libretto by Luigi Illica, Giuseppe Giacosa, Marco Praga and Domenico Oliva, based on the 1731 novel Histoire du Chevalier des Grieux, et de Manon Lescaut by Abbé Prévost. The opera was first performed in 1893 in Turin, at the Teatro Regio.

Suor Angelica (Sister Angelica) is an opera in one act by Giacomo Puccini to an original Italian libretto by Giovacchino Forzano. It is the second opera of the trio of operas known as Il trittico (The Triptych). It received its world premiere at the Metropolitan Opera on December 14, 1918.

Tosca is an opera in three acts by Giacomo Puccini to an Italian libretto by Luigi Illica and Giuseppe Giacosa. It premiered at the Teatro Costanzi in Rome on 14 January 1900. The work, based on Victorien Sardou's 1887 French-language dramatic play, La Tosca, is a melodramatic piece set in Rome in June 1800, with the Kingdom of Naples's control of Rome threatened by Napoleon's invasion of Italy. It contains depictions of torture, murder, and suicide, as well as some of Puccini's best-known lyrical arias. Puccini saw Sardou's play when it was touring Italy in 1889 and, after some vacillation, obtained the rights to turn the work into an opera in 1895. Turning the wordy French play into a succinct Italian opera took four years, during which the composer repeatedly argued with his librettists and publisher. Tosca premiered at a time of unrest in Rome, and its first performance was delayed for a day for fear of disturbances. Despite indifferent reviews from the critics, the opera was an immediate success with the public. Musically, Tosca is structured as a through-composed work, with arias, recitative, choruses and other elements musically woven into a seamless whole. Puccini used Wagnerian leitmotifs to identify characters, objects and ideas. While critics have often dismissed the opera as a facile melodrama with confusions of plot—musicologist Joseph Kerman famously called it a "shabby little shocker"—the power of its score and the inventiveness of its orchestration have been widely acknowledged. The dramatic force of Tosca and its characters continues to fascinate both performers and audiences, and the work remains one of the most frequently performed operas. Many recordings of the work have been issued, both of studio and live performances.

Turandot (Italian pronunciation: [turanˈdo] or, prescribed, [turanˈdɔt] ; see below) is an opera in three acts by Giacomo Puccini to a libretto in Italian by Giuseppe Adami and Renato Simoni. Puccini died in 1924, and his opera was left unfinished. The music was completed by Franco Alfano and premiered on 25 April 1926, almost a year and a half after Puccini's death. The opera is set in China and follows the Prince Calaf, who falls in love with the cold-hearted Princess Turandot. In order to win her hand in marriage, a suitor must solve three riddles, with a wrong answer resulting in his execution. Calaf passes the test, but Turandot refuses to marry him. He offers her a way out: if she is able to guess his name before dawn the next day, he will accept death.