Galina Ivanova Ustvolskaya (1919–2006) was a Russian composer known for her unique contributions to 20th-century classical music. Often referred to as the "fifth daughter" of Dmitri Shostakovich, she studied under him at the Leningrad Conservatory. Ustvolskaya's music is characterized by its spiritual intensity, stark rhythms, and often minimalist texture, blending elements of Russian Orthodox liturgical music with avant-garde practices. Notable works include her "Symphony No. 1" (1949), "Piano Sonata No. 6" (1970), and "Concerto for Piano and Strings" (1975). Her compositions frequently explore themes of existential struggle and transcendence, earning her a reputation for emotional depth and originality. Ustvolskaya's impact on music lies in her distinctive voice that defies categorization, often merging the sacred with the secular. Her works have gained recognition for their innovative use of sound and form, influencing contemporary composers and contributing to the discourse of modern classical music. Ustvolskaya remains an important figure for her defiance of stylistic norms and for her ability to evoke profound human experiences through her music.