Otakar Ostrčil (1879-1935) was a prominent Czech composer, conductor, and music educator, associated primarily with the genres of orchestral and chamber music. He was a key figure in the Czech music scene during the early 20th century, known for his contributions to both Czech national music and modernist trends. Ostrčil studied under notable composers such as Antonín Dvořák and later became a significant advocate for contemporary music. His notable works include the orchestral suite "Mysterium," the opera "Dvě vdovy" (The Two Widows), and various chamber pieces that highlight his lyrical style and innovative orchestration. Ostrčil's music often reflects a blend of nationalistic themes and modernist influences, characteristic of the Czech musical landscape of his time. Beyond composition, Ostrčil was influential as a conductor, leading the Czech Philharmonic and promoting the works of younger composers. His dedication to music education helped nurture future talents in the Czech Republic. Although not as widely recognized today, his impact on the development of Czech music and his role in bridging traditional and contemporary styles remain significant in the history of 20th-century classical music.