A flat major - Offertorium aus der Missa sacra op. 147. Par SCHUMANN ROBERT. In his Missa sacra, Op. 147, the Protestant Robert Schumann included the solo offertory hymn “Tota pulchra es, Maria”, entirely in the Romantic Catholic tradition of devotion to Mary. This wonderfully intimate movement for solo soprano, solo cello and organ can also be performed on its own, e.g. in church service or at a …