Verulamium Theatre, St Albans, Hertfordshire

Verulamium was one of the largest Roman cities in Britain, with lots remaining today to explore. You can visit the remains of the town and city walls in Verulamium Park, the Hypocaust (central heating system, built in about 200 AD), and a theatre – which claims to be a unique example in England, being a theatre with a stage, rather than a tradition Roman amphitheatre.

Built in about 140 AD, the theatre initially would have been used for anything from religious processions to wild beast shows. By about 300 AD, after some redevelopment work, it could seat 2000 spectators.

Source: Wikipedia