Saint Hildegard of Bingen, O.S.B. (German: Hildegard von Bingen; Latin: Hildegardis Bingensis) (1098 – 17 September 1179), also known as Saint Hildegard and Sibyl of the Rhine, was a German writer, composer, philosopher, Christian mystic, Benedictine abbess, visionary, and polymath.
Elected a magistra by her fellow nuns in 1136, Hildegard founded the monasteries of Rupertsberg in 1150 and Eibingen in 1165. One of her works as a composer, the Ordo Virtutum, is an early example of liturgical drama and arguably the oldest surviving morality play. She wrote theological, botanical, and medicinal texts, as well as letters, liturgical songs, and poems, while supervising miniature illuminations in the Rupertsberg manuscript of her first work, Scivias.
Although the history of her formal consideration is complicated, she has been recognized as a saint by branches of the Roman Catholic Church for centuries. On 7 October 2012, Pope Benedict XVI named her a Doctor of the Church.
Taken from Wikipedia page: http://en.wikipedia.org/wiki/Hildegard_of_Bingen