Ionuţ Holubeanu. Christianity in Roman Scythia: Ecclesiastical Organization and Monasticism (4th to 7th Centuries). Vol. 90. East Central and Eastern Europe in the Middle Ages, 450–1450. Leiden: Brill, 2024. xiii, 487 pp. Bibliography. Index. Illustrations. Photographs. Figures. Maps. $181.00, hard bound.