The Structure and Phases of the Castra Praetoria in Rome

By Elizabeth Legge


(Freepik, 2023)


The following is a discussion on the structure and phases of the Castra Praetoria, the barracks of the Praetorian Guard, built in AD 21 to

23 under the auspices of Tiberius Caesar’s praetorian prefect, Lucius Aelius Sejanus, to concentrate the nine Praetorians cohorts together with three Urban cohorts at one location within close proximity to Rome’s centre, as related by Cassius Dio.




(Cover adapted and personalized from Canva, 2023)