Today
View of the north-eastern corner of Castro Pretorio in June 2010 (on an early Sunday morning)
Today very busy roads go round the ancient walls, which have lost most of the small towers shown in the etching. The vast space inside the wall is now occupied by the Italian National Library and by modern barracks of the Italian Army.
Castro Pretorio
(left) Eastern side of the walls; (centre) a former gate in the northern side; (right) a small chapel between the projecting walls of a former tower
The barracks were built at the time of Emperor Tiberius on a site which was well outside the city limits, in compliance with the law which forbade armed people from entering Rome.
The castra had a rectangular shape and were protected by walls with a gate on each side; in 275 Emperor Aurelian incorporated them into the new walls of Rome; the external gates were closed. The Praetorian Guard was dissolved by Emperor Constantine who probably ordered the demolition of the western wall of the barracks
which was not part of the city fortifications.
Next plate in Book 1: Porta S. Lorenzo
Next step in your tour of Rione Monti: Porta Chiusa