Next stop on Rome's new underground: Hadrian's barracks

New finding brings the total number of known military garrisons in the area to five

Frescoed barracks which once housed the cavalry of the Emperor Hadrian's bodyguard have returned to light 19 centuries on, during excavations for a new underground train line in Rome.

In a find hailed as "unique" by archaeologists, weapons rooms, dormitories, kitchens and stables where some of ancient Rome's crack troops once lodged now lie open to the sky near the Colosseum, where the "Amba Aradam" stop of the Metro C line is being dug.