Listen to Christmas Mass: Benedictus - Agnus Dei online. Christmas Mass: Benedictus - Agnus Dei is an English language song and is sung by Lisa Larsson, Räto Tschupp, Aargauer Symphonie-Orchester, Regina Jakobi, Bernhard Gärtner, Alte Kantonsschule Aargau Chorus and René Koch. Christmas Mass: Benedictus - Agnus Dei, from the album Friedrich Theodor Fröhlich: Christmas Mass, Passion Music Overture, Fantasie & Concert Overture, was released in the year 2014. The duration of the song is 4:33. Download English songs online from JioSaavn.