The Notitia Dignitatum (Latin for "The List of Offices") is a unique document of the late Roman Empire. One of the very few surviving documents of Roman government, it details the administrative organization of the Eastern and Western Empires, listing several thousand offices from the imperial court down to the provincial level, diplomatic missions and army units. It is usually considered to be up to date for the Western Roman Empire in the 420s and for the Eastern or Byzantine Empire in the 390s. However, no absolute date is given in the text itself and omissions complicate deriving an absolute date from its content.