Johann Peter Emilius Hartmann (1805-1900) was a Danish composer and conductor known for his contributions to the Romantic music era. He was primarily associated with classical music, particularly in the realms of orchestral and choral compositions. Hartmann was a significant figure in the development of Danish music, often drawing inspiration from national themes and folk elements. Notable works include his symphonies, particularly Symphony No. 1 in D minor (1855) and Symphony No. 2 in E-flat major (1873), as well as various choral works like "Midsummer Night's Dream" and "The Great Mass in D." He also composed operas, with "Liden Kirsten" being one of his notable operatic contributions. Hartmann's impact on music extended beyond his compositions; he was an influential teacher and a key figure in the establishment of the Danish music scene. He played a crucial role in the foundation of the Royal Danish Academy of Music and was involved in various cultural organizations. His work helped lay the groundwork for future Danish composers, fostering a sense of national identity in music during the 19th century.