Caerleon is the historically important site of the Roman legionary fortress of Isca Augusta.
St Cadoc's Church stands over the principia (headquarters),[1] where the legionary standards were kept and statues of the Roman emperors venerated.
The earliest surviving part of the church dates back to just after the kingdom of Glywysing was overrun by the Normans during the twelfth century and is thought to be the work of Hywel ap Iowerth, who was also the founder of the Cistercian Llantarnam Abbey.
The church features a series of impressive stained-glass windows depicting the life of Christ and symbolising the faith and devotion of the saints associated with Caerleon.
St Cadoc's Church has been designated as Grade II* listed since 1951, as a centrepiece of the village with a fine medieval tower.