RACTA 2018 : Ricerche di Archeologia Cristiana, Tardantichita e Altomedioevo = Researches on Christian Archaeology, Late Antiquity and Early Middle Ages : 1st International conference of PhD students Rome, 5th-7th February 2018 / edited by Chiara Cecalupo, Giovanna Assunta Lanzetta, Priscilla Ralli.