Published annually, the journal Dumbarton Oaks Papers was founded in 1941 for the publication of articles relating to Byzantine civilization.In this issue:John S. Langdon and Stephen W. Reinert, Speros Vryonis Jr.: 19282019; Abraham Terian, Monastic Turmoil in Sixth-Century Jerusalem and the South Caucasus: The Letter of Patriarch John IV to Catholicos Abas of the Caucasian Albanians; Coleman Connelly, Continued Celebration of the Kalends of January in the Medieval Islamic East; Victoria Gerhold, The Legend of Euphratas: Some Notes on Its Origins, Development, and Significance; Christos Simelidis, Two Lives of the Virgin: John Geometres, Euthymios the Athonite, and Maximos the Confessor; Georgios Makris, Living in Turbulent Times: Monasteries, Settlements, and Laypeople in Late Byzantine Southwest Thrace; Philipp Niewöhner, The Significance of the Cross before, during, and after Iconoclasm: Early Christian Aniconism in Constantinople and Asia Minor; Stefania Gerevini, Art as Politics in the Baptistery and Chapel of SantIsidoro at San Marco, Venice; Laura Pfuntner, Between Science and Superstition: Photius, Diodorus Siculus, and Hermaphrodites; Baukje van den Berg, John Tzetzes as Didactic Poet and Learned Grammarian; Matthew Kinloch, In the Name of the Father, the Husband, or Some Other Man: The Subordination of Female Characters in Byzantine Historiography; Levente László, Rhetorius, Zenos Astrologer, and a Sixth-Century Astrological Compendium; and Stig Frøyshov, The Early History of the Hagiopolitan Daily Office in Constantinople: New Perspectives on the Formative Period of the Byzantine Rite.