Grieg was often inspired by Norwegian folk music. This can be heard in his songs and some of his instrumental music. His chamber music includes 3 violin sonatas and a cello sonata as well as a piano sonata and many shorter piano pieces. However, he has become very well known all over the world through his Piano Concerto and his music for "Peer Gynt". Another popular work is his "Holberg Suite" which was originally written for the piano but later arranged for string orchestra.