The Sei pezzi per pianoforte ("Six pieces for piano"), P 044, is a set of six solo piano pieces written by the Italian composer Ottorino Respighi between 1903 and 1905. These predominantly salonesque pieces are eclectic, drawing influence from different musical styles and composers. The pieces have various musical forms and were composed separately and later published together between 1905 and 1907 in a set under the same title for editorial reasons; Respighi had not conceived them as a suite, and therefore did not intend to have uniformity among the pieces. The set, under Bongiovanni, became his first published work. Five of the six pieces are derived from earlier works by Respighi, and only one of them, the "Canone", has an extant manuscript. The "Valse Caressante" displays elements of French salon; lyricism and Baroque are highlighted in the "Canone"; the most popular of the set, the "Notturno", shows signs of Impressionism; the "Minuetto" is reminiscent of the Classical era; the "Studio" is molded after Chopin's Études; The "Intermezzo-Serenata", resembling Fauré's music, demonstrates Respighi's Romanticism.

"Dies irae" (Ecclesiastical Latin: [ˈdi.es ˈi.re]; "the Day of Wrath") is a Latin sequence attributed to either Thomas of Celano of the Franciscans (1200–1265) or to Latino Malabranca Orsini (d. 1294), lector at the Dominican studium at Santa Sabina, the forerunner of the Pontifical University of Saint Thomas Aquinas (the Angelicum) in Rome. The sequence dates from the 13th century at the latest, though it is possible that it is much older, with some sources ascribing its origin to St. Gregory the Great (d. 604), Bernard of Clairvaux (1090–1153), or Bonaventure (1221–1274). It is a medieval Latin poem characterized by its accentual stress and rhymed lines. The metre is trochaic. The poem describes the Last Judgment, the trumpet summoning souls before the throne of God, where the saved will be delivered and the unsaved cast into eternal flames. It is best known from its use in the Roman Rite Catholic Requiem Mass (Mass for the Dead or Funeral Mass). An English version is found in various Anglican Communion service books. The first melody set to these words, a Gregorian chant, is one of the most quoted in musical literature, appearing in the works of many composers. The final couplet, Pie Jesu, has been often reused as an independent song.

This is a complete list of the compositions by the Italian composer Ottorino Respighi (1879–1936). This list can be sorted by catalogue number (P), year composed, title, and genre. Catalog numbers were attributed by Potito Pedarra, an Italian musicologist who dedicated most of his activity to the study of the works of Respighi.

The Sei pezzi per pianoforte ("Six pieces for piano"), P 044, is a set of six solo piano pieces written by the Italian composer Ottorino Respighi between 1903 and 1905. These predominantly salonesque pieces are eclectic, drawing influence from different musical styles and composers. The pieces have various musical forms and were composed separately and later published together between 1905 and 1907 in a set under the same title for editorial reasons; Respighi had not conceived them as a suite, and therefore did not intend to have uniformity among the pieces. The set, under Bongiovanni, became his first published work. Five of the six pieces are derived from earlier works by Respighi, and only one of them, the "Canone", has an extant manuscript. The "Valse Caressante" displays elements of French salon; lyricism and Baroque are highlighted in the "Canone"; the most popular of the set, the "Notturno", shows signs of Impressionism; the "Minuetto" is reminiscent of the Classical era; the "Studio" is molded after Chopin's Études; The "Intermezzo-Serenata", resembling Fauré's music, demonstrates Respighi's Romanticism.

Teresa Procaccini (born 23 March 1934 in Cerignola) is an Italian composer and music educator. She taught composition at the Accademia di Santa Cecilia in Rome. Procaccini has won a number of prizes, including the Viotti competition, the Casella Prize and the International String Quartet Competition of San Francisco.

Ottorino Respighi ( resp-EE-ghee, US also rəsp-; Italian: [ottoˈriːno reˈspiːɡi]; 9 July 1879 – 18 April 1936) was an Italian composer, violinist, teacher, and musicologist and one of the leading Italian composers of the early 20th century. His compositions range over operas, ballets, orchestral suites, choral songs, chamber music, and transcriptions of Italian compositions of the 16th–18th centuries, but his best known and most performed works are his three orchestral tone poems which brought him international fame: Fountains of Rome (1916), Pines of Rome (1924), and Roman Festivals (1928). Respighi was born in Bologna to a musical and artistic family. He was encouraged by his father to pursue music at a young age, and took formal tuition in the violin and piano. In 1891, he enrolled at the Liceo Musicale di Bologna, where he studied the violin, viola, and composition, was principal violinist at the Russian Imperial Theatre, and studied briefly with Nikolai Rimsky-Korsakov. He relocated to Rome in 1913 to become professor of composition at the Liceo Musicale di Santa Cecilia. During this period he married his pupil, singer Elsa Olivieri-Sangiacomo. In 1923, Respighi quit his professorship to dedicate time to tour and compose, but continued to teach until 1935. He performed and conducted in various capacities across the United States and South America from 1925 until his death. In late 1935, while composing his opera Lucrezia, Respighi became ill and was diagnosed with bacterial endocarditis. He died four months later, aged 56. His wife Elsa outlived him for almost 60 years, championing her late husband's works and legacy until her death in 1996. Conductor and composer Salvatore Di Vittorio completed several of Respighi's incomplete and previously unpublished works, including the finished Violin Concerto in A major (1903) which premiered in 2010.

Ottorino Respighi ( resp-EE-ghee, US also rəsp-; Italian: [ottoˈriːno reˈspiːɡi]; 9 July 1879 – 18 April 1936) was an Italian composer, violinist, teacher, and musicologist and one of the leading Italian composers of the early 20th century. His compositions range over operas, ballets, orchestral suites, choral songs, chamber music, and transcriptions of Italian compositions of the 16th–18th centuries, but his best known and most performed works are his three orchestral tone poems which brought him international fame: Fountains of Rome (1916), Pines of Rome (1924), and Roman Festivals (1928). Respighi was born in Bologna to a musical and artistic family. He was encouraged by his father to pursue music at a young age, and took formal tuition in the violin and piano. In 1891, he enrolled at the Liceo Musicale di Bologna, where he studied the violin, viola, and composition, was principal violinist at the Russian Imperial Theatre, and studied briefly with Nikolai Rimsky-Korsakov. He relocated to Rome in 1913 to become professor of composition at the Liceo Musicale di Santa Cecilia. During this period he married his pupil, singer Elsa Olivieri-Sangiacomo. In 1923, Respighi quit his professorship to dedicate time to tour and compose, but continued to teach until 1935. He performed and conducted in various capacities across the United States and South America from 1925 until his death. In late 1935, while composing his opera Lucrezia, Respighi became ill and was diagnosed with bacterial endocarditis. He died four months later, aged 56. His wife Elsa outlived him for almost 60 years, championing her late husband's works and legacy until her death in 1996. Conductor and composer Salvatore Di Vittorio completed several of Respighi's incomplete and previously unpublished works, including the finished Violin Concerto in A major (1903) which premiered in 2010.