César-Auguste-Jean-Guillaume-Hubert Franck (10 December 1822 – 8 November 1890) was a composer, pianist, organist, and music teacher who worked in Paris during his adult life.
He was born at Liège, in what is now Belgium (though at the time of his birth it was part of the United Kingdom of the Netherlands). He gave his first concerts there in 1834 and studied privately in Paris from 1835, where his teachers included Anton Reicha. After a brief return to Belgium, and a disastrous reception to an early oratorio Ruth, he moved to Paris, where he married and embarked on a career as teacher and organist. He gained a reputation as a formidable improviser, and travelled widely in France to demonstrate new instruments built by Aristide Cavaillé-Coll.
In 1858 he became organist at Sainte-Clotilde, a position he retained for the rest of his life. He became professor at the Paris Conservatoire in 1872; he took French nationality, a requirement of the appointment. His pupils included Vincent d'Indy, Ernest Chausson, Louis Vierne, Charles Tournemire, Guillaume Lekeu and Henri Duparc. After acquiring the professorship Franck wrote several pieces that have entered the standard classical repertoire, including symphonic, chamber, and keyboard works.
Franck was born in Liège, then part of the United Kingdom of the Netherlands (from 1830 part of Walloon-speaking Belgium) to Nicolas-Joseph Franck, a bank clerk whose family came from the German-Belgian border, and Marie-Catherine-Barbe Franck (née Frings), who was from Germany. Although young César-Auguste, as he was known in his early years, showed both drawing and musical skills, Nicolas-Joseph envisioned him as a young prodigy pianist-composer, after the manner of Franz Liszt or Sigismond Thalberg, who would bring fame and fortune to his family. His father entered Franck at the Royal Conservatory of Liège, studying solfège, piano, organ, and harmony with Joseph Daussoigne-Méhul and other faculty members. César-Auguste gave his first concerts in 1834, one before Leopold I of the newly formed Kingdom of Belgium.