Dion C. Smythe is researching "Byzantine Citizenship" for a chapter contribution on citizenship in the ancient world. Under the Byzantine Empire, the legal concept of Roman citizenship established in 212 CE was transformed, as people were identified as Byzantines or subjects of the Emperor. Smythe's research will examine how legal definitions of citizenship changed from the 6th century legal reforms of Justinian to the end of the Byzantine Empire in 1453, focusing on periods where legal sources survive.