High Quality Content by WIKIPEDIA articles! Augustinian nuns are the most ancient and continuous segment of the Roman Catholic Augustinian religious order under the canons of contemporary historical method. The Augustinian nuns, named after Saint Augustine of Hippo (died AD 430), are several Roman Catholic enclosed monastic orders of women living according to a guide to religious life known as the Rule of St. Augustine. Prominent Augustinian nuns include Italian composer Vittoria Aleotti, Italian mystic St. Clare of Montefalco, German mystic Anne Catherine Emmerich and St. Rita of Cascia.