Hildegard of Bingen
Her visions were personally reviewed by a pope at a church council while she was alive, giving her work an unusually well-documented institutional stamp of approval for a medieval woman. She is now frequently credited in modern wellness and goddess-spirituality writing with teachings she never actually held.
Hildegard of Bingen, Scivias (1141–51); papal examination at the Synod of Trier (1140s)
Twelfth-century German abbess, visionary and composer, among the very few medieval women whose mystical writings were formally examined and approved by the Church in her own lifetime.