Alexander Nikolayevich Scriabin (6 January 1872 [O.S. 25 December 1871] – 27 April [O.S. 14 April] 1915) was a Russian composer and pianist. Before 1903, Scriabin was greatly influenced by the music of Frédéric Chopin and composed in a relatively tonal, late-Romantic idiom. Later, and independently of his influential contemporary Arnold Schoenberg, Scriabin developed a much more dissonant musical language that had transcended usual tonality but was not atonal, which accorded with his personal brand of metaphysics.
https://en.wikipedia.org/wiki/Alexander_Scriabin