J. H. Kurtz, Church History (Volumes 1-3)
“ Down to the end of the fifth century Arianism was professed by the larger portion of the German world, by Visigoths and Ostrogoths, by Vandals, Suevi and Burgundians, by the Rugians and Herulians, by the Longobards, etc. And as the early friendly relations to the Roman empire had given Arianism a foundation among those peoples, so the later hostile relations to the Roman empire now turned Catholic made them cling tenaciously to their Arian heresy. ”
