Lostwithiel was a town planned in the 1100s by the Cardinhams, builders of the castle at nearby Restormel. As the lowest bridging point on the River Fowey it was a thriving port in the 1200s when Earl Edmund made it the administrative and commercial capital of his earldom. It later became the location of the Duchy Palace on the formation of the Duchy of Cornwall in 1337.

The Duchy Palace at Lostwithiel

Population 1861: 1,500

Population 2011: 2,800

Planned population 2031: 3,200

New housing in formerly undisturbed countryside just outside Lostwithiel