Notitia Dignitatum
The Notitia dignitatum et administrationum omnium tam civilium quam militarium (Latin for 'List of all dignities and administrations both civil and military') is a document of the Late Roman Empire that details the administrative organization of the Western and the Eastern Roman Empire. 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.