Portland Castle, built in 1540 and one of the best-preserved of the Device Forts, guarded the anchorage in Portland Roads — a sheltered roadstead used by the English fleet and potentially usable by an invasion force. Its compact D-shaped plan with a single circular keep placed maximum firepower in a limited coastal space. The castle remained in active military use until the twentieth century.
None recorded
Captain and garrison of gunners; heavy artillery battery
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Research a location near Dorset