De Administrando Imperio ("On the Governance of the Empire") is the Latin title of a Greek-language work written by the 10th-century Eastern Roman Emperor Constantine VII. The Greek title of the work is Πρὸς τὸν ἴδιον υἱὸν αὐτοῦ Ῥωμανὸν ("To [my] own son Romanos"). It is a domestic and foreign policy manual for the use of Constantine's son and successor, the Emperor Romanos II. It is a prominent example of Byzantine encyclopaedism. Source: Wikipedia (en)