The Notitia Urbis Constantinopolitanae belongs to the ancient genre of “regionaries”: a list of monuments and civil servants in the regions of a city. The text was published by the great German scholar Otto Seeck, as an appendix to his edition of the Notitia Dignitatum (1876). The Notitia Urbis was written during the reign of the emperor Theodosius II (probably in 447-450) and goes back to official sources. Although the simple lists are not always easy to understand, the Notitia Urbis helps to know what the city must have looked like before Justinian‘s building program.