Cecilia Bartoli OMRI (born 4 June 1966) is an Italian mezzo-soprano widely known in the music of Bellini, Handel, Mozart, Rossini and Vivaldi and for lesser-known music of the Baroque and Classical periods. She has also sung soprano and alto repertory.

Bartoli is considered a singer with an unusual timbre. According to Nicholas Wroe in 2001, her voice was known for its "fully developed sumptuousness of the lower register, the vibrancy of the middle range...the top was limpid and powerful", and she was one of the most popular opera singers of recent years.

Bartoli was born in Rome. Her parents, Silvana Bazzoni and Pietro Angelo Bartoli, were professional singers and gave her her first music lessons. She first performed publicly at age nine as the shepherd boy in Tosca. Bartoli later studied at the Conservatorio di Santa Cecilia in Rome. At the age of 19, she made her singing debut on the Italian television show Fantastico. She did not win the competition but was asked to sing with Paris Opera for an homage concert for Maria Callas.

Bartoli made her professional opera debut in 1987 at the Arena di Verona. The following year she undertook the role of Rosina in Rossini's The Barber of Seville at the Cologne Opera, the Schwetzingen Festival and the Zurich Opera earning rave reviews. Working with conductors Daniel Barenboim and Nikolaus Harnoncourt, Bartoli focused on Mozart roles, such as Zerlina in Don Giovanni and Dorabella in Così fan tutte, and from then on her career developed internationally.

In 1990, she made her debut at the Opéra Bastille as Cherubino in Mozart's The Marriage of Figaro and her debut at the Hamburg State Opera as Idamantes in Mozart's Idomeneo, followed by her La Scala debut as Isolier in Le comte Ory in 1991, a performance that solidified her reputation as one of the world's leading Rossini singers.

In 1996, Bartoli made her debut at the Metropolitan Opera as Despina in Così fan tutte and returned in 1997 to sing the title role of La Cenerentola and in 1998 to sing the role of Susanna in The Marriage of Figaro. In 2000, she sang in another Mozart soprano role, Donna Elvira in Don Giovanni, at the Deutsche Oper Berlin. In 2001, she made a long-awaited Royal Opera House debut, taking the roles of Euridice and the Genio in the London stage premiere of Haydn's L'anima del filosofo.

In addition to Mozart and Rossini, Bartoli has spent much of her career performing and recording Baroque and early Classical era music by such composers as Gluck, Vivaldi, Haydn and Salieri. In early 2005, she sang Cleopatra in Handel's Giulio Cesare. She often performs with the Baroque ensemble Il Giardino Armonico.

In 2012, Bartoli produced a project entitled Mission, which premiered the works of Agostino Steffani, a lesser-known Baroque composer. Bartoli produced the music of the composer in CD form as well as an extended music video that portrays her as the priest-composer Agostino in the palace of Versallies. The video is known for its historic and visual accuracy of the Baroque period. Cecilia Bartoli's performance and production of Mission reflect the music and aesthetic of Steffani's time period through the setting, wardrobe, and cinematography." ...

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