Bruno de Labriolle on Instagram: "One of my favorite pieces from the Codex of Alienor of Brittany (13th century)—also known as the Fontevraud Gradual, named after the Fontevraud Abbey where Alienor served as abbess. The manuscript is primarily composed of Gregorian chant, organized according to their unique local order, but it also includes three remarkable examples of early polyphony: * This Marian sequence (sequences are rhythmical poems sung after the Alleluia and before the Gospel) * A Chris