Constantine Porphyrogenitus, De administrando imperio and the Byzantine historiography of the mid-10th century

The paper is dedicated to certain aspects of the treatise De administrando imperio, composed at the court of Emperor Constantine VII Porphyrogenitus in 948-952. It first examines the diplomatic basis of the information collected in the treatise, then the management of the information available from other sources and some common information found in it and in other contemporary works such as Theophanes Continuatus, Vita Basilii and De thematibus. It closes with a conclusion about the authorship of the treatise and its place in the context of the historiographical activity at the court of Constantine VII Porphyrogenitus in the mid-10th century.