Hernando de Cabezon (c. 1510–1566) was a prominent Spanish composer and music theorist of the Renaissance period, primarily known for his contributions to early keyboard music and liturgical compositions. He was a member of the Spanish royal court and served as a music teacher and organist. De Cabezon's genre primarily encompasses sacred and secular music, including instrumental works for keyboard instruments, particularly the organ and harpsichord. His notable works include collections such as "Las Flores de la Música," a compilation of keyboard pieces that reflect the rich polyphonic style of the time and include variations and ornamentations on popular themes. His impact on music is significant as he helped to bridge the transition from medieval music to the more complex harmonies of the Baroque era. De Cabezon's compositions influenced later composers, particularly in the realm of keyboard music, and his approach to variation and improvisation laid the groundwork for future developments in Western music. His work remains important for understanding the evolution of musical forms and practices during the Renaissance.