Esteban Salas y Castro (1734-1803) was a prominent Cuban composer and music educator, often regarded as the first significant composer of classical music in Cuba. He was born in Santiago de Cuba and served as the chapel master at the Cathedral of Santiago, where he composed a vast array of sacred music, including masses, motets, and hymns, showcasing the influence of both Spanish and Italian Baroque styles. Salas's notable works include "Misa de Réquiem" and "Misa de la Conversión de San Pablo," which highlight his mastery of choral composition and orchestration. His music is characterized by rich harmonies, intricate counterpoint, and a deep spiritual fervor, reflecting the cultural and religious milieu of his time. Salas's impact on music is significant, as he laid the groundwork for subsequent generations of Cuban composers. His efforts not only contributed to the development of classical music in Cuba but also helped preserve and promote the island's musical heritage. His legacy endures in the continued performance and study of his works, marking him as a pivotal figure in the evolution of Cuban classical music.