The document discusses program music, which is instrumental music associated with an extra-musical story, poem, or scene. It introduces Hector Berlioz as a pioneer of program music and discusses his Symphonie fantastique. It then discusses the rise of musical nationalism in the Romantic period, where composers incorporated elements of folk music and stories from their native countries and cultures into their music. It provides examples from Bedrich Smetana, Antonin Dvorak, Peter Ilyich Tchaikovsky, and Johannes Brahms.