The Notitia Dignitatum (Latin for "The List of Offices") is a document of the late Roman Empire that details the administrative organization of the Eastern and Western Empires. It is unique as one of very few surviving documents of Roman government, and describes several thousand offices from the imperial court to provincial governments, diplomatic missions, and army units. It is usually considered to be accurate for the Western Roman Empire in the AD 420s and for the Eastern or Byzantine Empire in the AD 390s. However, the text itself is not dated (nor is its author named), and omissions complicate ascertaining its date from its content.