Who composed the symphonic poem "Finlandia"?

"Finlandia, Op. 26", is a symphonic poem or tone poem, a piece of orchestral music, usually in a single continuous movement, which illustrates or evokes the content of a poem, short story, novel, painting, landscape, or other (non-musical) source. It was composed by the Finnish composer Jean Sibelius in 1899.

Most of the piece is rousing music, evoking the national struggle of the Finnish people until the end when a calm comes over the orchestra, with the melodic Finlandia Hymn also created by Sibelius.

Jean Sibelius born Johan Julius Christian Sibelius (8 December 1865 – 20 September 1957), was a Finnish composer of the late Romantic and early-modern periods. He is regarded as his country's greatest composer, and his music is often credited with having helped Finland develop a national identity during its struggle for independence from Russia.

He created seven symphonies, as well as several pieces inspired by nature, Nordic mythology, and the Finnish national epic poem, the Kalevala. He composed over a hundred songs for voice and piano; incidental music for numerous plays; a one-act opera; chamber music, piano music, Masonic ritual music, and 21 publications of choral music.

Sibelius composed until the mid-1920s, when he stopped producing major works. His last 30 years are referred to as the "silence of Järvenpää", (the location of his home). Although this 'silence' has often perplexed scholars, in reality, Sibelius was clear: he felt he had written enough.