Thomas Arentzen is a Postdoctoral Research Fellow in the Faculty of Theology at the Universitetet i Oslo and currently a Fellow in Byzantine Studies at Dumbarton Oaks Research Library and Collection in Washington, DC. He is also a Reader in Church History at Lunds Universitet. He has published widely in the fields of Marian Studies, Byzantine homiletics and hymnography as well as Eastern Christianity. His books include Ortodoxa och österländska kyrkor i Sverige (2015) and The Virgin in Song: Mary and the Poetry of Romanos the Melodist (2017). Mary B. Ccunningham is an Honorary Associate Professor in the Department of Theology and Religious Studies at the University of Nottingham. She works on Byzantine homiletics, with special interest in the interaction between preacher and audience, as well as on the veneration of the Virgin Mary in early Christianity and Byzantium on other Byzantine literary genres including hagiography and hymnography. Her books include Faith in the Byzantine World (2002), Wider Than Heaven: Eighth-Century Homilies on the Mother of God (2008), and Gateway of Life: Orthodox Thinking on the Mother of God (2015).