Miguel Hilarion Eslava y Elizondo (1808–1878) was a prominent Spanish composer and music educator, known for his contributions to the development of choral and religious music in Spain during the 19th century. His work primarily falls within the genre of sacred music, where he composed numerous masses, hymns, and motets that were widely performed in churches across the country. Notable works by Eslava include "Misa de Réquiem," "Misa de San Juan Bautista," and various settings of traditional Spanish hymns. His compositions are characterized by their rich harmonies and melodious lines, effectively blending traditional liturgical forms with contemporary influences of his time. Eslava's impact on music extends beyond his compositions; he was a significant figure in music education, serving as a professor at the Royal Conservatory of Madrid, where he influenced a generation of musicians. His efforts helped elevate the standards of choral music in Spain, making it more accessible and appealing. Eslava’s legacy continues to be celebrated, particularly in the context of Spanish liturgical music and choir performances.