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Deal Castle© DeFacto / Wikimedia Commons · CC BY-SA 4.0
Tudor and later gun forts built to command harbours and coasts. 26 on the map.
Bayard's Cove Castle: a blockhouse in Dartmouth
Devon
An artillery fort in Cornwall.
Cornwall
Calshot Castle: a 16th century artillery castle
Hampshire
Artillery castle and associated earthworks at Camber
East Sussex
Round gun tower guarding a Scilly channel.
Tudor artillery fort shaped like a rose.
Kent
Restored Napoleonic-era gun tower in Dymchurch, among the best-kept of Kent's Martello towers, with a period 24-pounder gun back on the roof.
An artillery fort in Hampshire.
Fort of around 1860 in Gosport, one of a ring guarding Portsmouth against French invasion, with a round keep set within its own moat.
Gun batteries and ramparts built between the 1500s and 1700s around the Garrison headland above Hugh Town, where Elizabethan Star Castle stands.
An artillery fort in Kent.
Harry's Walls unfinished 16th century artillery castle and adjacent prehistoric standing stone at Mount Flagon, St Mary's
Hull Castle, South Blockhouse and part of late 17th century Hull Citadel Fort at Garrison Side
East Riding of Yorkshire
King Charles' Castle mid-16th century artillery castle and Civil War earthen artillery defence on western Castle Down, Tresco
Henry VIII's artillery fort on the Falmouth headland, garrisoned through to the Second World War.
Charles II's vast 1660s citadel at the eastern end of Plymouth Hoe, still home to a serving army regiment behind its carved baroque gateway.
St Catherine's Castle 16th century blockhouse, 19th century gun battery and 20th century gun emplacement at St Catherine's Point
Blockhouse known as the Cow Tower
Norfolk
Star-shaped 17th-century artillery fort on the Thames, England's best-preserved of its kind.
Essex
Artillery castle at Upnor
Artillery castle at Walmer
Wark Castle motte and bailey castle and artillery fort
Northumberland
Huge network of brick-lined ditches and forts cut into the chalk above Dover, dug to stop a French invasion that never came.
