Johann Sebastiani (c. 1564 – 1625) was a German composer and musician associated with the late Renaissance and early Baroque periods. He is best known for his contributions to sacred music, particularly in the genre of choral works. Sebastiani's most notable compositions include settings of the Passion and various motets, which reflect the stylistic transition from the polyphonic traditions of the Renaissance to the more expressive, homophonic textures characteristic of the early Baroque. One of his significant works is the "Passion According to St. Matthew," which illustrates his ability to blend lyrical melodies with intricate counterpoint. His music often showcases rich harmonies and a dramatic use of text, making it impactful during his time. Sebastiani's influence can be seen in the works of later composers who sought to combine sacred themes with the evolving musical styles of the Baroque era. His emphasis on emotional expression and clarity in vocal writing paved the way for future developments in choral and liturgical music, marking him as a notable figure in the transition of Western classical music.