Augustini (Canons Regular of the Order of St. Augustine) were used, whereby the term order (Latin ordo) referred more to a form of life or a stratum of society, reminiscent of the usage of the equestrian order or senatorial order of Roman society, rather than to a religious order in the modern sense of a closely organized body. Furthermore, within what we could call the pool of Augustinian Canons, some groups acquired a greater degree of distinctiveness in their style of life and organization, to the point of being in law or in effect autonomous religious orders. Examples include the Premonstratensian or Norbertine Order, sometimes known in English as White Canons, from their white habits. Yet another such order is that of the Crosiers. Encouraged by the general policies of the Holy See, especially from the late nineteenth century, some of these separate orders and congregations of Augustinian Canons have subsequently combined in some form of federation or confederation. All the different varieties of canons regular are to be distinguished not only from secular canons but also from: Monks, who in the Western tradition are members of monastic religious orders such as the various branches of Benedictines, or the Carthusians whose members in their history have often been laymen, not priests. Writing at a time before the foundation of the mendicant orders (friars), Pope Urban II (died 1099), said there were two forms of religious life: the monastic (like the Benedictines and Cistercians) and the canonical (like the Augustinian Canons). He likened the monks to the role of Mary, and the canons to that of her sister, Martha. The Friars of Saint Augustine, sometimes called simply Augustinians or in English Augustinian friars or Austin friars, who are one of the mendicant orders. The mendicants are called "friars", not "monks" nor "canons" and were originally itinerant preachers like the Franciscans or Dominicans, living on what the people gave them in food and alms. The Augustinian friars were a galaxy of dispersed religious groups, many of them hermits who in the 13th century were formed by the Popes and Church councils into a religious order with structures that followed the model of the mendicant orders. The Augustinian friars drew their inspiration from the ancient and flexible Rule of St. Augustine, hence their name. However, they did not combine this with the structures or manner of life of the canons regular. Clerks regular