Giovanni Maria Trabaci (c. 1575–1647) was an influential Italian composer and organist of the early Baroque period, primarily known for his work in sacred music and keyboard compositions. His genre encompassed primarily liturgical music, but he also contributed significantly to instrumental music, particularly for the organ. Trabaci served as the organist at the Cathedral of Naples, where he composed a variety of works, including motets, masses, and a collection of instrumental music. His notable works include the "Madrigali a cinque voci" (Madrigals for Five Voices) and "Capricci d’organo" (Organ Caprices), which showcase his innovative use of counterpoint and rich harmonic language. Trabaci's impact on music is marked by his role in the development of the Neapolitan school of composition, influencing later Baroque composers. He was among the first to integrate the emerging style of the Baroque with the traditional polyphonic techniques of the Renaissance. His contributions helped bridge the transition between these two musical eras, making him a significant figure in the evolution of Western art music.