A Roman fort, measuring approximately 120m by 110m, occupied the flat summit of a bluff above the confluence of the rivers Usk and Gavenny. Excavations in 1972-3 and in 1999 demonstrated that the first phase of the fort was in existence by AD 60 and this was followed by a second phase rebuild between AD 65 and 70. A third military phase was dated to sometime after AD 250, but not long afterwards the fort went out of use to be superceded by a civilian settlement which was occupied until at least the end of the fourth century.
Sources: Jarrett 1969 (Roman Frontier in Wales, 2nd edition), 45-6;
Blockley 1993 (Archaeological Journal 150), 169-242;
Ponsford 1999 (Archaeology in Wales 39), 98-100.
J.Wiles, RCAHMW, 10 August 2004