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Upnor Castle is a Tudor artillery fort built between 1561 and 1567 on the Medway estuary in Kent to protect English naval vessels and the royal dockyard at Chatham. The castle features the characteristic low, angular bastioned design typical of mid-sixteenth-century coastal defences, constructed to withstand cannon fire rather than to mount offensive artillery in significant numbers. Built under the direction of military engineer Richard Watts, the fort comprises a central keep surrounded by angled bastions and defensive walls, and originally included gun emplacements and accommodation for a garrison. The castle gained historical prominence during the Medway Raid of 1667, when Dutch naval forces attacked English shipping on the river, and the fort's subsequent upgrading demonstrated the continued strategic importance of protecting the Medway approaches and the growing naval complex at Chatham.
Artillery castle at Upnor is a scheduled monument protected by Historic England under reference 1012980. View the official record →
Upnor Castle is a Tudor artillery fort built between 1561 and 1567 on the Medway estuary in Kent to protect English naval vessels and the royal dockyard at Chatham. It is designated a Scheduled Ancient Monument by Historic England (NHLE) under reference 1012980.
Artillery castle at Upnor is a Scheduled Ancient Monument, legally protected by Historic England (NHLE) — the body responsible for designating and safeguarding heritage sites in England. The official designation reference is 1012980.
Several scheduled monuments lie within 10 km, including Brook Low Level Pumping Station (2.8 km), Fort Pitt (3 km), Fort Clarence (3.5 km).
This page is just one thread. A full Aubrey report pulls together 15 strands of Artillery castle at Upnor's history, each drawn from the record and mapped to the exact spot:
Every location is different. Not every section appears for every place, only what the historical record actually holds turns up in a report.
Artillery castle at Upnor stands on Thanet Sand Formation, bedrock that formed in the Thanetian. The rock here is sand, silt and clay.