Jean Sibelius was a Finnish composer who is widely regarded as Finland's greatest composer and one of the most significant figures in the late Romantic and early modern periods of classical music. He is best known for his symphonies, tone poems, and violin concerto. Sibelius' music is often characterized by its evocative and atmospheric qualities, drawing inspiration from the natural landscapes and folklore of Finland. His work has had a lasting impact on the development of Finnish national identity and has earned him international acclaim as a leading figure in classical music.