In 1997, Marcel Pérès and his Ensemble Organum began a simultaneous exploration of the Mozarabic rite (the liturgical chant peculiar to the Christians living in Spain at the time of Arab rule) and of the Samaa spiritual practice of Morocco. Setting aside the theological differences between the two faiths, the artists discovered a great deal of kinship between the two forms of musical expression. A veritable utopia, the idea for this recording then suggested itself: through music, to regain the lost accord of human brotherhood.

This recording came to fruition thanks to nearly 25 years of effort. In 1997, Marcel Pérès and his Ensemble Organum began a simultaneous exploration of the Mozarabic rite (the liturgical chant peculiar to the Christians living in Spain at the time of Arabrule) and of the Samaa spiritual practice of Morocco. Setting aside the theological differences between the two faiths, the artists discovered a great deal of kinship between the two forms of musical expression. A veritable utopia, the idea for this recording then suggested itself: to regain the lost accord of human brotherhood through music.

This Requiem is known in five sources; two of them mention no composer, two attribute it to Antoine de Févin, one, the Occo Codex, to Antoine Divitis. It is recorded here in the version transmitted by an early sixteenth-century manuscript, the Occo Codex, a sumptuous, richly illuminated volume. The book was originally intended for use in worship at one of the oldest churches in Amsterdam, built in the fourteenth century on the site of a miracle which played a fundamental role in constituting the religious identity of Amsterdam. Occo was the name of the rich merchant who financed the production of the manuscript.