Giovanni Battista Gagliano (c. 1690–c. 1760) was an Italian composer and musician known for his contributions to the Baroque music genre. He was primarily active in Naples, where he became notable for his operas, sacred music, and instrumental compositions. One of Gagliano's most significant works is the opera "Il re pastore," which showcases his ability to blend lyrical melodies with dramatic expression typical of the Baroque style. He also composed several oratorios and cantatas, contributing to the sacred music repertoire. His works often feature rich harmonic textures and intricate vocal lines, reflecting the influence of his contemporaries and the prevailing musical trends of the time. Gagliano's impact on music lies in his role in the development of Neapolitan opera, which became a significant force in the evolution of Italian opera. While he may not be as widely recognized as his contemporaries, such as Alessandro Scarlatti, his compositions helped pave the way for future generations of composers in the Baroque tradition and beyond. His works continue to be appreciated for their melodic beauty and emotional depth within the context of the Baroque era.