Posted in Web Lewes Castle & Barbican House Museum – 2019 All You Need … November 13, 2019 About Lewes Castle is open year round, and has a wonderful view from the top of the Keep. Next door is the Barbican House Museum with displays of the history of Sussex. https://www.tripadvisor.com/Attraction_Review-g186275-d613866-Reviews-Lewes_Castle_Barbican_House_Museum-Lewes_East_Sussex_England.html