The Augustinian monastic order is constituted at the Lecceto Monastery when Pope Alexander IV issues a papal bull Licet ecclesiae catholicae.

Augustinians are members of several religious orders that follow the Rule of Saint Augustine, written about A.D. 400 by Augustine of Hippo. There are two distinct types of Augustinians in Catholic religious orders dating back to the 12th–13th centuries:Various congregations of Canons Regular follow…