Edvard Hagerup Grieg (15 June 1843 – 4 September 1907) was a Norwegian composer and pianist. He is widely considered one of the leading Romantic era composers, and his music is part of the standard classical repertoire worldwide. His use and development of Norwegian folk music in his own compositions put the music of Norway in the international spectrum, as well as helping develop a national identity. Carl August Nielsen (9 June 1865 – 3 October 1931) is widely recognized as Denmark's greatest composer, and is also recognized as being a skilled conductor and a violinist.Brought up by poor but musically talented parents on the island of Funen, he demonstrated his musical abilities at an early age. While it was some time before his works were fully appreciated, even in his home country, Nielsen has now firmly entered the international repertoire.Especially in Europe and the United States, Nielsen's music is ever more frequently performed, with interest growing in other countries as well.Carl Nielsen is especially admired for his six symphonies, his Wind Quintet and his concertos for violin, flute and clarinet. In Denmark, his opera Maskarade and a considerable number of his songs have become an integral part of the national heritage.While his early music was inspired by composers such as Brahms and Grieg, he soon started to develop his own style, first experimenting with progressive tonality and later diverging even more radically from the standards of composition still common at the time. Johan Severin Svendsen (30 September 1840 – 14 June 1911) was a Norwegian composer, conductor and violinist. Born in Christiania (now Oslo), Norway, he lived most his life in Copenhagen, Denmark. Svendsen's output includes two symphonies, a violin concerto, a cello concerto, and the Romance for violin, as well as a number of Norwegian Rhapsodies for orchestra. At one time Svendsen was an intimate friend of the German composer Richard Wagner. Dag Ivar Wirén (15 October 1905 – 19 April 1986) was a Swedish composer. Wirén studied at the Stockholm conservatory.