Here are just 11 of those buildings, which date back to the 11th century.
5. Bodiam Castle
Bodiam Castle was built in the 14th century and it is a perfect example of mediaeval architecture, surrounded by a moat Photo: National Trust
6. Chichester Cathedral
Chichester Cathedral has been at the centre of life in Chichester for more than nine centuries. It was founded in 1075, when the seat of the bishop was moved from Selsey. Photo: Emily Turner
7. Cowdray Heritage Ruins
Cowdray Heritage Ruins are one of England’s most important early Tudor houses and Cowdray is known to have been visited by both King Henry VIII and Queen Elizabeth I. Photo: Steve Robards
8. Hiorne Tower
Hiorne Tower in Arundel Park is a triangular tower that was built in 1797 by Francis Hiorne in a failed bid to win the contract to rebuild Arundel Castle. Photo: Elaine Hammond