Gustav Hollaender (1855–1920) was a German composer and conductor, primarily recognized for his contributions to the genre of operetta and popular music in the late 19th and early 20th centuries. His works often featured catchy melodies and light-hearted themes, characteristic of the operetta style that flourished in Europe during this period. Hollaender is best known for his compositions for the stage, including the operetta "Die schöne Galathee" (1901) and the musical "Der Vetter aus Dingsda" (1910), which became particularly popular in German-speaking countries. His songs, such as "Mein Lebenslauf ist Liebeslauf," have endured in popularity and have been covered by various artists over the years. Hollaender's impact on music lies in his ability to blend traditional operatic elements with the emerging popular music trends of his time, paving the way for future composers in the light music genre. His work contributed to the evolution of musical theatre, influencing the development of the modern musical. Today, he is remembered as a significant figure in the history of German operetta and popular song, reflecting the cultural landscape of his era.