The profoundly beautiful Requiem by Johannes Ockeghem may have been composed to commemorate the death of a French king. We'll hear a performance by Cappella Pratensis, which was recently included in Gramophone's list of Top Choice classical recordings. We'll also hear some of Ockeghem's songs performed by the Boston-based ensemble Blue Heron.

• Johannes Ockeghem: Requiem. Performed by Cappella Pratensis.
• Johannes Ockeghem: Aultre Veunus estes sans faille. Performed by Blue Heron.
• Johannes Ockeghem: Quant de vous seul je pers la veue. Performed by Blue Heron.
• Johannes Ockeghem: Mort, tu as navré de ton dart. Performed by Blue Heron.
• Johannes Ockeghem: O Rosa Bella. Performed by Blue Heron.
• Johannes Ockeghem: Fors seullement l’actente ce qu’ay promis. Performed by Blue Heron.