Lying at the heart of the city of Venta Silurum, the forum-basilica at Caerwent tells the public, municipal, story of the Civitas Silurum in south Wales. The re-excavation of this complex between 1987 and 1995 revealed a wealth of new information that has a great deal to tell us about the history of the city and the fortunes of its inhabitants. Constructed in the early second century and rebuilt in the middle of the fourth century, the forum-basilica was where the administrative, judicial, commercial and religious functions of the city were located. The modifications to the basilica at the very end of the Roman period indicate continued use of this civic space in the later fourth and fifth centuries.

A carved coping stone found on the site of a spring near the amphitheatre, Silchester, and first reported in 1873, was rediscovered in 2014. It does not compare in its carved detail with coping stones from the amphitheatres at Chester and London, nor with that recovered from the West Gate, Silchester, in 1890; nor does its basal width correspond with that of the arena wall of the Silchester amphitheatre. It is likely to have formed part of a monumental basin, similar to that found at Coventina's Well, Northumberland, and to have commemorated the location of a spring and its associated (unknown) deity. Similarity with the type and decoration of architectural stone used in the construction of the forum-basilica suggests a Hadrianic–Antonine date.