It is not until the sixth century that musical instruments start to be used more openly. Boethius (AD c. 480-525) was a Christian scholar from Rome who wrote De Institutione Musica based on the Greek notation before his time. In one of the sections called Musica Instrumentalis, he outlines the use of voice and musical instruments. Scholars consider his work to be foundational for the rise of music in the Middle Ages and Renaissance, and subsequently this led to the birth of classical music.