An order of canons, known as Augustinians because they followed the so-called Rule of Saint Augustine, was formed in the 11th and 12th centuries. This order consisted of the clergy of some cathedrals and collegiate churches who lived a monastic life and took religious vows but whose duties were clerical. They wore a black habit and a white surplice.
The order of Augustinian mendicant friars was formed in the 13th century by groups of hermits who followed the teaching of Saint Augustine of Hippo. They wear a black habit with a leather girdle.