Which German composer used cyclic forms in their pieces?
Cyclic form:  Sometimes a theme may occur at the beginning and end (for example, in Mendelssohn's A minor String Quartet or Brahms's Symphony No. 3); other times a theme occurs in a different guise in every part (e.g. Berlioz's "Symphonie Fantastique", and Saint-Saëns's "Organ" Symphony).
i don't know