Abstract
THIS paper is part of a longer study that hopes to make a contribution to the classification of styles in the fourth century and to bring some answer to the questions that constantly confront the student of the period, viz.: is the art of Italy in this epoch homogeneous, as it has generally been treated, or is it composed of different styles partly indigenous and partly foreign? if foreign style can be isolated, is it to be attributed to importation or to local manufacture by foreign workmen?