Listen to Missa Pro Defunctis : Agnus Dei online. Missa Pro Defunctis : Agnus Dei is an English language song and is sung by Alain Zaepffel, Stéphane Caillat, Michel Laplénie, Jean-Louis Bouillat, Virginia Pattie, Ensemble Per Cantar e Sonar and Laure Noël. Missa Pro Defunctis : Agnus Dei, from the album Requiem pour un Millénaire, was released in the year 1999. The duration of the song is 2:50. Download English songs online from JioSaavn.