How did Franz Liszt change piano writing and orchestral music during the Romantic era?

Franz Liszt was a transformative figure in the Romantic movement, fundamentally altering both piano and orchestral music through his technical and harmonic innovations.1

Innovations in Piano Writing

Liszt radically expanded piano technique, moving beyond mere virtuosity to provide the instrument with a rich, full, and almost orchestral sound. Inspired by the violin techniques of Niccolò Paganini, he sought to transfer complex effects to the keyboard. Furthermore, he was the first to perform complete solo recitals and frequently transcribed works by composers such as Johann Sebastian Bach, Ludwig van Beethoven, and Hector Berlioz to encourage their appreciation.12

Orchestral Music and Composition

Liszt revolutionized orchestral music by inventing the symphonic poem, a single-movement form inspired by literature, art, or natural scenes. Central to his compositions was the method of "transformation of themes," where one or two themes are modified to provide the basis for an entire work—a principle that influenced the development of leitmotifs. Additionally, his exploration of chromatic harmony extended the harmonic language of his era, ultimately anticipating the breakdown of tonality and the rise of atonal music in the 20th century.134