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One of Portsmouth's oldest permanent fortifications. The Round Tower was built in around 1418 to defend the entrance to Portsmouth Harbour and prevent raids on the city by French ships. Inside there is a fine vaulted brick ceiling dating from the early 19th Century. It was part of the city's defences until 1960. The top of the building is open at all times, but the ground floor is only open on selected occasions.
Castle or defences
Please contact us to find out when the Round Tower is open this year.
Free admission. Children under 13 must be accompanied by an adult.