Original: He is best known for his Piano Concerto in A minor, for his incidental music to Henrik Ibsen's play Peer Gynt (which includes Morning Mood and In the Hall of the Mountain King), and for his collection of piano miniatures Lyric Pieces.
Simplified: He is best known for his Piano Concerto in A minor and for his incidental music to Henrik Ibsen's play Peer Gynt which includes movements called Aubade and In the Hall of the Mountain King.