Jakob Ludwig Felix Mendelssohn Bartholdy (German: [ˈjaːkɔp ˈluːtvɪç ˈfeːlɪks ˈmɛndl̩szoːn baʁˈtɔldi]; 3 February 1809 – 4 November 1847), born, and generally known in English-speaking countries, as Felix Mendelssohn, was a German composer, pianist, organist and conductor of the early Romantic period.

A grandson of the philosopher Moses Mendelssohn, Felix Mendelssohn was born into a prominent Jewish family, although initially he was raised without religion and was later baptised as a Reformed Christian. Mendelssohn was recognised early as a musical prodigy, but his parents were cautious and did not seek to capitalise on his talent.

Early success in Germany, where he also revived interest in the music of Johann Sebastian Bach, was followed by travel throughout Europe. Mendelssohn was particularly well received in Britain as a composer, conductor and soloist, and his ten visits there – during which many of his major works were premiered – form an important part of his adult career. His essentially conservative musical tastes, however, set him apart from many of his more adventurous musical contemporaries such as Franz Liszt, Richard Wagner and Hector Berlioz. The Leipzig Conservatoire (now the University of Music and Theatre Leipzig), which he founded, became a bastion of this anti-radical outlook.