The Codex of Guardiagrele includes several compositions by artists (from Abruzzo and other regions) that worked in Guardiagrele at the Santa Maria Maggiore church. These compositions expose the then-richness of polyphonic music in this region. The Codex includes several early 15th c. manuscripts of liturgic missals conserved until 1979 in Guardiagrele. Directing the De Bon Parole ensemble in this world premiere recording is Marco Giacintucci, who also realized the reconstructions.