Hildegarde von Bingen (+1179) is one of the newest saints in the liturgical calendar, canonized ‘equipollently’ by Pope Benedict XVI on May 12, 2012 (since she had always been regarded as a saint, but never officially canonized). Her feast was extended to the universal Church, now on the same day as Saint Robert Bellarmine (so choose your saint!). The same Pontiff also declared her one of the elite Doctors of the Church that same year, on October 7, 2012 (the feast of the Most Holy Rosary).
As a young girl, she was offered as an oblate to the Benedictines (as would Saint Thomas Aquinas a century and a half hence), and Hildegarde spent her life following the balanced rule of Saint Benedict, founding and governing convents, and leading many to holiness.
Saint Hildegarde was a remarkable woman, cultured, erudite, balanced, deeply prayerful, and gifted with ongoing mystical visions of God, and the relation of us human creatures, and all the world, to Him, journeying towards the eschaton, all of which she recorded in three treatises. These were approved by Saint Bernard of Clairvaux, and Pope Eugenius III.