Grieg collaborated with the dramatist Bjornson in the play Sigurd Jorsalfar, for which he provided incidental music, and still more notably with Ibsen in Peer Gynt.
The original music for the latter makes use of solo voices, chorus and orchestra, but is most often heard in orchestral form in the two suites arranged by the composer.
These include Morning, Aase's Death, Anitra's Dance and In the Hall of the Mountain King in the first suite, and Ceremonial March, Arabian Dance, Peer Gynt's Homecoming and Solveig's Song in the second, the order not corresponding to the sequence of events in Ibsen's remarkable play.
In addition to the two Peer Gynt Suites and three pieces from Sigurd Jorsalfar, Grieg wrote one of the most famous of all romantic piano concertos, completed in 1868.
The so-called Holberg Suite, more correctly Suite from the Time of Holberg, for string orchestra, celebrates the Scandinavian Molière, the Norwegian playwright Ludvig Holberg, an almost exact contemporary of J.S. Bach and Handel.
The two Elegiac Melodies of 1881 are also for strings only, with other arrangements of piano music, and the Lyric Suite, based on four piano pieces of 1891, was orchestrated in 1904.
Grieg's three violin sonatas remain a part of standard romantic repertoire, revealing his mastery of harmonic colour in the clearest of textures; the third of these, in C minor, was completed in 1887 and is particularly striking.
As a pianist himself, Grieg wrote extensively for the piano, excelling, in particular, in his ten volumes of Lyric Pieces, and in other sets of short compositions for the instrument, often derived directly or indirectly from Norwegian folk-music.