As gleaned from various Internet sources, Abbess Hildegard of Bingen was an extraordinary person for her day and age. She was a mystic, a diplomat, author and composer. Her music is contained in " Symphonia armonie celestium revelationum (Symphonic Harmony of Celestial Revelations), the Latin texts dealing with the hierarchy of Heaven, from God, Father and Son to Confessors, Virgins and Innocents. Her monophonic musical language is based on a number of varied melodic formulae. Her morality play Ordo virtutum (Order of Virtues), written some 150 years after the Terentian verse plays of the nun, Hrotswitha of Gandersheim, also includes music of a simpler and more syllabic kind.