Rough Castle Fort

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Frontiers and fortifications (limes, Hadrian's Wall)

A section of the Antonine Wall just to the west of the fort.

The "lilias" north west of the fort.

Rough Castle Fort is a Roman fort on the Antonine Wall roughly 2 kilometres south east of Bonnybridge in the Falkirk council area, Scotland.

The Antonine Wall was built around 143 CE and stretched from Bo'ness on the River Forth to Old Kilpatrick on the River Clyde. The fort is the best preserved of the 19 forts constructed along the length of the Wall. Built against the southern rear face of the Wall, the fort was defended by 6 metre thick turf ramparts and surrounded by defensive ditches. Gateways were provided through the main Wall to the north, and also through the walls on the other three sides of the fort. Causeways were then constructed across the main Antonine and secondary defensive ditches, affording easy access to and from the fort.

The fort was the second smallest on the Wall and had an area of about 4,000 square metres. The fort contained several substantial stone buildings, including a headquarters, the commander's house, barracks, a bath house and a granary. Although the original buildings have not survived, the foundations of these buildings were discovered during excavations in 1902 - 1903, 1932 and 1957 - 1961.

Inscriptions found on recovered artifacts indicate that the fort was the base for 500 men of the Sixth Cohort of Nervii, an infantry unit recruited from a north eastern Gallic tribe. The military way on the south side of the Wall, which enabled transport between all forts, is still well defined, and there is also a fine length of rampart and ditch still intact to the west.

A feature of the defences at the fort, discovered during the excavations, is a series of pits lying to the north west of the causeway across the Antonine ditch. These pits, known as "lilias", would originally have contained sharpened stakes at the bottom. The lilias were positioned to help defend the vulnerable northern gateway through the Wall.