Igor Fyodorovich Stravinsky was a Russian composer, pianist, and conductor. He is widely considered one of the most important and influential composers of the 20th century.
Stravinsky's compositional career was notable for its stylistic diversity. He first achieved international fame with three ballets commissioned by the impresario Sergei Diaghilev and first performed in Paris by Diaghilev's Ballets Russes: The Firebird (1910), Petrushka (1911) and The Rite of Spring (1913). The last of these transformed the way in which subsequent composers thought about rhythmic structure and was largely responsible for Stravinsky's enduring reputation as a musical revolutionary who pushed the boundaries of musical design. His "Russian phase" which continued with works such as Renard, The Soldier's Tale and Les Noces, was followed in the 1920s by a period in which he turned to neoclassical music. The works from this period tended to make use of traditional musical forms (concerto grosso, fugue and symphony), drawing on earlier styles, especially from the 18th century. This style was often referred to as Neoclassicism. In the 1950s, Stravinsky adopted serial procedures. His compositions of this period shared traits with examples of his earlier output: rhythmic energy, the construction of extended melodic ideas out of a few two- or three-note cells and clarity of form, and of instrumentation.

Francis Jean Marcel Poulenc was a French composer and pianist. Poulenc's wealthy family intended him for a business career in the Rhone Poulenc family company and did not allow him to enrol at a music college. Largely self-educated musically, he studied with the pianist Ricardo Viñes, who became his mentor after the composer's parents died. Poulenc soon came under the influence of Erik Satie, under whose tutelage he became one of a group of young composers known collectively as Les Six. This group of French composers from the 1920s aimed to clear music of the impressionism of Claude Debussy, and German influences such as the Romanticism of Richard Wagner and Richard Strauss. Their motto was "L'art pour l'art": they composed music for the sake of music, without any 'meaning' or extramusical intents. In his early works Poulenc became known for his high spirits and irreverence. During the 1930s a much more serious side to his nature emerged, particularly in the religious music he composed from 1936 onwards, which he alternated with his more light-hearted works.