“Sumer Is Icumen In” (also called the Summer Canon and the Cuckoo Song) is a medieval English round song of the mid-13th century. This rota is the oldest known musical composition featuring six-part polyphony and is possibly the oldest surviving example of independent melodic counterpoint. It is featured on this week's Continuum along with other 13th century English music. CD recordings used will be Sumer Is Icumen In (The Hilliard Ensemble) - Chandos CHAN 9396, and Miri It Is (The Dufay Collective) - Harmonia Mundi HMA 1951154.