Castra Peregrina, Military barracks on Caelian Hill, Rome, Italy
The Castra Peregrina was a military installation on the Caelian Hill containing barracks, administrative quarters, and a temple to Jupiter Redux. The excavated remains reveal how soldiers lived and worked within separate buildings arranged across the site.
This military complex operated from the 2nd to 4th century and was part of the broader Roman security system. Archaeological work between 1904 and 1909 uncovered the foundations and structural remains of the installation.
The barracks housed the frumentarii, soldiers who worked as imperial agents and gathered intelligence for the emperor. Visitors today can sense how this place was central to keeping Rome's security network operating.
The site sits on the Caelian Hill and is accessible from the Via di San Gregorio and surrounding paths. The remains are exposed and uneven in places, so sturdy footwear and careful footing are recommended.
Excavations revealed stone ships left by soldiers as votive offerings to the gods. These handmade objects suggest that soldiers sought divine protection for sea voyages and journeys away from Rome.
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