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, she 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 brilliant miniature Illuminations.

Hildegard has never been fully canonized as a saint by the Catholic church, so references to her as "Saint" are strictly honorary in terms of Catholicism; however her renewed canonization process is currently scheduled to be complete by October 2012.