 In the 1880s, Gnosticism was placed within Greek philosophy, especially neo-Platonism.Adolf von Harnack (1851–1930), who belonged to the "School of the History of Dogma" and proposed a "Kirchengeschichtliches Ursprungsmodell", saw Gnosticism as an internal development within the church under the influence of Greek philosophy.According to Harnack, Gnosticism was the "acute Hellenization of Christianity."