Carl August Nielsen was a prominent Danish composer, born on June 9, 1865, in Nielsen's birthplace, Sortelung, Denmark. He is best known for his symphonies, operas, and chamber music, which reflect a unique blend of nationalistic and modernist styles. His works often incorporate elements of Danish folk music, showcasing his deep connection to his homeland. Nielsen's most famous compositions include the Symphony No. 4, also known as the "Inextinguishable," and the opera Maskarade. Throughout his career, he contributed significantly to the development of Danish music and is regarded as one of Denmark's greatest composers, passing away on October 3, 1931.