Description:Arthur Frothingham, a father of the discipline of Art History, here lists and categorizes the form and development of the Roman triumphal arch, using epigraphy and geographical context to refine our understanding of the reasons for the building of such structures and the conditions under which the individual arches were commisioned. This piece is a concise and thorough review of the surviving arches and a thought-provoking analysis of their use and meaning.