Reginald De Koven (1859-1920) was an American composer known primarily for his contributions to the genre of light opera and musical theater in the late 19th and early 20th centuries. He was a prominent figure in the development of American operetta, often characterized by its melodic charm and comedic elements. Notable works by De Koven include the operettas "The Robin Hood" (1890), "The Water Princess" (1899), and "The Beauty and the Beast" (1910). His music often featured lush orchestration and engaging melodies, appealing to both audiences and performers. De Koven's impact on music lies in his role in popularizing the operetta form in America, helping to pave the way for future musical theater composers. His work contributed to the establishment of a distinctly American voice in operatic and theatrical music during a time when European influences were predominant.