The term "classical music" refers most often to the period from the mid-18th to the 19th & early 20th centuries. Composers from different periods, such as Johann Sebastian Bach, Wolfgang Amadeus Mozart, Ludwig van Beethoven, Johannes Brahms, and many others, are all considered classical composers. Frédéric Chopin (1810-1849), a Polish-French composer and pianist of the Romantic era. Renowned for his emotive and expressive piano compositions, such as the "Nocturnes" and the Revolutionary Étude. Chopin's innovative approach to melody and musical form left a permanent mark, making him an influential figure in 19th-century classical music.