In what year was the abbess who wrote the biography of Bertha of Bingen born?
Hildegard of Bingen Hildegard of Bingen, O.S.B. (German: "Hildegard von Bingen" ; ; 1098 – 17 September 1179), also known as Saint Hildegard and Sibyl of the Rhine, was a German Benedictine abbess, writer, composer, philosopher, Christian mystic, visionary, and polymath. She is considered to be the founder of scientific natural history in Germany.
Bertha of Artois Saint Bertha of Artois or Saint Bertha of Blangy (mid 7th century - July 4, 725) was a Frankish and Anglo-Saxon Abbess of noble blood.