Year 1874 (MDCCCLXXIV) was a common year starting on Thursday (link will display the full calendar) of the Gregorian calendar (or a common year starting on Tuesday of the 12-day slower Julian calendar.

Wilhelm Richard Wagner ( /ˈvɑːɡnər/; German pronunciation: [ˈʁiçaʁt ˈvaːɡnɐ]; 22 May 1813 – 13 February 1883) was a German composer, conductor, theatre director and polemicist primarily known for his operas (or "music dramas", as he later called them). Wagner's compositions, particularly those of his later period, are notable for their complex texture, rich harmonies and orchestration, and the elaborate use of leitmotifs: musical themes associated with individual characters, places, ideas or plot elements. Unlike most other opera composers, Wagner wrote both the music and libretto for every one of his stage works. Perhaps the two best-known extracts from his works are the Ride of the Valkyries from the opera Die Walküre, and the Wedding March (Bridal Chorus) from the opera Lohengrin.

Initially establishing his reputation as a composer of works such as The Flying Dutchman and Tannhäuser which were broadly in the romantic vein of Weber and Meyerbeer, Wagner transformed operatic thought through his concept of the Gesamtkunstwerk ("total work of art"). This would achieve the synthesis of all the poetic, visual, musical and dramatic arts and was announced in a series of essays between 1849 and 1852. Wagner realized this concept most fully in the first half of the monumental four-opera cycle Der Ring des Nibelungen. However, his thoughts on the relative importance of music and drama were to change again, and he reintroduced some traditional operatic forms into his last few stage works, including Die Meistersinger von Nürnberg.

 Arnold Schoenberg (help·info) (pronounced [ˈaːɐ̯nɔlt ˈʃøːnbɛɐ̯k]; 13 September 1874 – 13 July 1951) was an Austrian composer and painter, associated with the expressionist movement in German poetry and art, and leader of the Second Viennese School. He used the spelling Schönberg until after his move to the United States in 1934 (Steinberg 1995, 463), whereupon he altered it to Schoenberg "in deference to American practice" (Foss 1951, 401), though one writer claims he made the change a year earlier (Ross 2007, 45).

Schoenberg's approach, both in terms of harmony and development, is among the major landmarks of 20th-century musical thought; at least three generations of composers in the European and American traditions have consciously extended his thinking or, in some cases, passionately reacted against it. During the rise of the Nazi Party in Austria, his music was labeled, alongside jazz, as degenerate art^{[citation needed]}.

Schoenberg was widely known early in his career for his success in simultaneously extending the traditionally opposed German Romantic styles of Brahms and Wagner. Later, his name would come to personify pioneering innovations in atonality (although Schoenberg himself detested the term "atonality" as inaccurate in describing his intentions) that would become the most polemical feature of 20th-century art music. In the 1920s, Schoenberg developed the twelve-tone technique, a widely influential compositional method of manipulating an ordered series of all twelve notes in the chromatic scale. He also coined the term developing variation, and was the first modern composer to embrace ways of developing motifs without resorting to the dominance of a centralized melodic idea.

Josef Gabriel Rheinberger (17 March 1839, in Vaduz – 25 November 1901, in Munich) was a German organist and composer, born in Liechtenstein.

When only seven years old Rheinberger became organist at Vaduz Parish Church, and his first composition was performed the following year. In 1851 he entered the Munich Conservatory, where he later became professor of piano and subsequently professor of composition. When the Munich Conservatorium was dissolved he was appointed répétiteur at the Court Theatre, from which he resigned in 1867.

Rheinberger married his former pupil Franziska von Hoffnaass in 1867. He was influenced by painting and literature (especially English and German).

In 1877 Rheinberger obtained the rank of court conductor, a position that gave him responsibility for the music in the royal chapel. He was later awarded an honorary degree of Doctor of Philosophy by Ludwig Maximilian University of Munich. A distinguished teacher, he numbered many Americans among his pupils, including Horatio Parker, William Berwald, George Whitefield Chadwick, Bruno Klein, and Henry Holden Huss. When the present Conservatorium was founded in Munich, Rheinberger was appointed its professor of organ and composition, a post he held until his death. He was also given the title "Royal Professor".

Gustav Theodore Holst (born Gustavus Theodore von Holst, 21 September 1874 – 25 May 1934) was an English composer. He is most famous for his orchestral suite The Planets.

His early works show the influence of Grieg, Wagner,Richard Strauss and fellow student Ralph Vaughan Williams, and later, through Vaughan Williams, the music of Ravel. The combined influence of Ravel, Hindu spiritualism and English folk tunes enabled Holst to free himself of the influence of Wagner and Strauss and to forge his own style. Holst's music is well known for unconventional use of metre and haunting melodies.

Holst composed almost 200 works, including operas, ballets, choral hymns and songs. An enthusiastic educator, Holst became music master at St Paul's Girls' School in 1905 and director of music at Morley College in 1907, continuing in both posts until retirement. He also taught singing at Wycombe Abbey School from 1912 until 1917.

He was the brother of Hollywood actor Ernest Cossart and father of the composer and conductor Imogen Holst, who wrote a biography of him in 1938.