Henricus Isaac was a notable composer of the Renaissance period, born around 1450 in the region of Flanders. He is best known for his contributions to the development of polyphonic music, which involves multiple independent melodies sung or played simultaneously. Isaac's works include masses, motets, and secular songs, showcasing his skill in both sacred and secular genres. Isaac served in the courts of various European nobility, including the Habsburg court in Vienna. His music was influential in shaping the style of the time, and he is often associated with the Franco-Flemish school of composers. His compositions remain significant in the study of early music.