Claim: Vespro della Beata Vergine, Vespers for the Blessed Virgin, has seven Versus out of 15 parts.
Evidence: 1 Versicle & Response 2 Psalm 3 Motet 4 Psalm 5 Motet 6 Psalm 7 Motet 8 Psalm 9 Motet 10 Psalm 11 Sonata 12 Hymnus 13 Magnificat