for SSSAA unaccompanied. Recent scholarship postulates that this anonymous motet for the Feast of the Assumption of the Blessed Virgin Mary was in fact written by Leonora d'Este, daughter of Duke Alfonso I and Lucrezia Borgia, and abbess of the Corpus Domini Convent in Ferrara. The music and style of d'Este's compositions are skilful in the art of polyphonic writing and the beautiful Sicut lilium inter spinas, written for five voices, is a fine example of this style. Offprinted from The Oxford Book of Upper-Voice Polyphony.