Gregory Thaumaturgus
Gertrude was never formally canonized, but a liturgical office of prayer, readings, and hymns in her honor was approved by Rome in 1606. The Feast of Saint Gertrude was extended to the Catholic Church by Clement XII and today is celebrated on November 16, the date of her death. Some religious communities, including the Benedictines, celebrate her feast on November 17, which had originally been chosen, but was already occupied by St. Gregory Thaumaturgus, whom Benedict XIV deemed unfit to be unseated by a woman. This is why the pope established November 15 as her feast day by Papal decree. Pope Benedict XIV gave her the title "the Great" to distinguish her from Abbess Gertrude of Hackeborn and to recognize the depth of her spiritual and theological insight.