Lied
Robert Schumann wrote many fine songs.  He was a pianist before he became a composer, so it is not surprising that the piano parts of his songs are at least as important as the voice part.   His song-cycle Dichterliebe (Poet’s love) contains some of his best songs. They often have a dream-like atmosphere.  He especially liked setting words by the poets Joseph von Eichendorff and Heinrich Heine.