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.: 1928–2019”; 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 Sant’Isidoro 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, Zeno’s Astrologer, and a Sixth-Century Astrological Compendium”; and Stig Simeon R. Frøyshov, “The Early History of the Hagiopolitan Daily Office in Constantinople: New Perspectives on the Formative Period of the Byzantine Rite.”