Cirencester Amphitheatre2013-04-12 · Free entry The earthwork remains of one of the largest Roman amphitheatres in Britain, built in the early 2nd century to serve the city of Corinium (Cirencester), then second only in size & importance to London.How to find usCirencester AmphitheatreGloucestershireVisit the attraction’s website ↗Get directions ↗