César Cui (1835-1918) was a Russian composer, musicologist, and music critic, primarily associated with the late Romantic period and the Russian nationalist movement in music. He was one of the "Mighty Handful," a group of composers including Modest Mussorgsky, Nikolai Rimsky-Korsakov, and Alexander Borodin, who sought to develop a distinctively Russian style of classical music. Cui's notable works include operas such as "The Prisoner of the Caucasus" (1893) and "Le Flibustier" (1901), as well as a significant number of songs and chamber music. One of his most famous pieces is the operatic work "The Angel" (1895), based on a story by Anton Chekhov. Additionally, he composed numerous piano pieces and symphonic works. Cui's impact on music lies in his contributions to Russian operatic and orchestral repertoire, and his efforts to promote Russian folk themes