Heritage sites across Sussex are opening to the public for free as part of a nationwide event.
Organisers of Heritage Open Days said the event, which runs until 21 September, was England’s largest festival of history and culture.
Among the sites involved are Petworth House and Park, Anne of Cleves House Museum in Lewes, William Blake’s seaside cottage in Bognor Regis, and Bateman’s, former home of writer Rudyard Kipling, in Burwash.
The festival, which runs annually for 10 days and involves thousands of local volunteers and organisations, has the theme of architecture this year.