Ars Antiqua

The ars antiqua began to be mentioned in writings about music in the early decades of the fourteenth century, where it was cited along with references to a more modern "art", an ars nova. It was understood by those who coined the notion to be rooted in the musical practices outlined in the Ars musica of Lambertus and, especially, the Ars cantus mensurabilis of Franco of Cologne.