The camp was built by order of the emperor Septimius Severus in about 202 A.D., at the 15^th mile of the Via Appia, to provide headquarters for the 6000 or so soldiers enlisted in the Legio II Parthica (also called Albana).

The Castra were fortified by a massive circuit wall in opus quadratum, topped by battlements. They covered an area of ten hectares that was roughly rectangular in plan, with the sides measuring 435 m. by 232 m.

To complete the fortifications, circular towers were placed at the four corners and quadrangular ones along the long sides.

Large portions of the circuit walls can still be seen today, as can some of the towers and the impressive monumental ruins of buildings, the main gates, some stretches of road paving and some public works, not to mention the remains of hoses and warehouses.

The fonds from the excavation of the camp are kept in the Albano Museum.

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