The first of these groups was formed in a wood outside Milan by three noble Milanese, Alexander Grivelli, Antonio Petrasancta, and Albert Besuzzi, who were joined by others, including some priests. In 1375 Pope Gregory XI gave them the Rule of St Augustine, with set of constitutions. As a canonically recognized order they took the name "Fratres Sancti Ambrosii ad Nemus" and adopted a habit consisting of a brown tunic, scapular, and hood.