Os Cupertinos are a choral ensemble that has made a name for itself in the field of Portuguese Renaissance polyphony. Under the direction of Pedro Teixeira, they present Rosa Sine Spinis. The programme explores Marian devotion during the golden age of Portuguese polyphony, revealing motets and other works of rare purity. In the austere and luminous Romanesque nave of Rates, the voices rise in a repertoire that blends faith and sonic splendour.