Giovanni Maria Casini (1645–1712) was an Italian composer and musician, primarily associated with the Baroque period. Although not as widely known as some of his contemporaries, he made significant contributions to the development of sacred and instrumental music in Italy. Casini's work is characterized by its melodic richness and intricate counterpoint, reflecting the stylistic trends of the early Baroque. His notable works include a collection of motets and sacred music, as well as instrumental compositions, particularly for strings. Casini served as a composer at various churches and institutions in Italy, where he gained a reputation for his ability to blend traditional liturgical forms with innovative musical ideas. Despite his relatively lesser-known status, Casini's influence can be seen in the way he paved the path for future composers of the late Baroque era. His ability to merge vocal and instrumental elements laid groundwork for the evolving musical forms that would follow, particularly in the realm of church music and early orchestral arrangements. His legacy is appreciated by music scholars and enthusiasts interested in the lesser-acknowledged figures of the Baroque period.