Number of imperial portraits (average), per year of reign (N=1625), excluding emperors that ruled less than a year and imperial portraits that circulated prior to the emperor's accession

The figure presented here includes the average number of sculptural portraits of Roman emperors (mostly carved from marble or casted in bronze), per year of rule, that were collected for the purposes of analyzing the representation of Roman emperors in freestanding sculpture. PhD dissertation: S. Heijnen (2022), Portraying Change: The Representation of Roman Emperors in Freestanding Sculpture (ca. 50 BC - ca. 400 AD). Dissertation. Radboud University.