Reviews some of the documentation concerning the Puy de Musique of the Confraternity of Saint Cecilia of the Norman town of Évreux and considers the circumstances of the composition and the musical fabric of Cantantibus Organis, a five-voice motet that was awarded the Puy's "silver organ" in 1583, by Orlando di Lasso, concluding that Lasso probably thought to submit the piece, which had been composed in 1579 or earlier, to the competition as he remembered the prize he won in 1575 as he worked on the publication of three volumes of his motets by his Munich printer, Adam Berg, in 1582.