This choral event features the Vocal Ensemble of the Maîtrise de Paris performing sacred polyphony in the Church of the Immaculate Heart of Mary. Tracing its origins to Butry-sur-Oise has served as a peaceful riparian village that inspired numerous pre-impressionist artists including Daubigny. The performance anchors the regional identity of the Oise riverbanks as a territory dedicated to the preservation of classical vocal traditions and spiritual art. offer an immersive journey through a spiritual and acoustic journey where professional polyphony meets the intimate atmosphere of a local regional sanctuary. The concert has a profound social impact by uniting residents through a shared appreciation of communal singing and historical village architecture. For music researchers it delivered a rare opportunity to study the vocal dynamics of a choir within a specific regional building style. The initiative ensures the legacy of sacred music continues to thrive in the northern metropolitan outskirts through youth education.