Rita of Cascia, OSA, was an Italian widow and Augustinian nun. After Rita's husband died, she joined an Augustinian community of religious sisters, where she was known both for practicing mortification of the flesh and for the efficacy of her prayers. Various miracles are attributed to her intercession, and she is often portrayed with a bleeding wound on her forehead, which is understood to indicate a partial stigmata.

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, are several Roman Catholic enclosed monastic communities of women living according to a guide to religious life known as the Rule of St. Augustine. Prominent Augustinian nuns include Italian mystic St. Clare of Montefalco and St. Rita of Cascia.