Pirro Conte d'Albergati Capacelli (c. 1500-1571) was an Italian composer and nobleman of the Renaissance period, primarily associated with the genre of sacred music. He is recognized for his contributions to the development of polyphony during a time when choral music was becoming increasingly intricate and expressive. Capacelli's notable works include several motets and masses, many of which reflect the stylistic characteristics of the Roman School of music. His compositions often employed smooth melodic lines and rich harmonic textures, contributing to the evolution of choral practices in Italy. One of his most significant contributions to music is the "Missa de Beata Virgine," which exemplifies his skill in intertwining vocal parts while maintaining clarity of text—a hallmark of Renaissance polyphony. His work influenced subsequent generations of composers by showcasing the potential of choral writing and the use of textural contrast. While not as widely known as contemporaries like Palestrina, Capacelli's impact lies in his ability to bridge earlier styles with emerging practices in sacred music, making him an important figure in the history of Renaissance music.