Source: Vyšehradský sborník – Vyšehrad CollectionSiglum: CZ-Pkvk 376Folios: 186v-187vFolio: 186vSequence: 1Full text (or incipit): Imperatrix angelorumGenre: SqRubrics: ProsaFeast: De BMVFeast (text): Comm. BMVCantus ID: ah54226Form: M