In the seventh century the Anglo-Saxons built an abbey dedicated to St Peter, where the Roman Ermine Street crossed the River Nene. The town around the Abbey came to be known as St Peter's Burgh, and is dominated today by the cathedral on the site. However, there are many other fascinating buildings in Peterborough that mark the stages of its history, from the remains of a Saxon church and a Norman castle and the first purpose-built prisoner of war...