A source-cited reference to device forts
The Device Forts, also known as Henrician castles and blockhouses, were a series of artillery fortifications built to defend the coast of England and Wales by Henry VIII. Traditionally, the Crown had left coastal defences in the hands of local lords and communities but the threat of French and Spanish invasion led the King to issue an order, called a "device", for a major programme of work between 1539 and 1547. (From the Wikipedia article Device Forts, licensed CC BY-SA 4.0.)
28 entries in 1 category: Device Forts (28).
Quick facts: Location: English and Welsh coasts; Built: 1539–47; Builder: Henry VIII; Materials: Stone, brick, earth; In use: 16th–20th centuries; Condition: Varied; Open to public: Most.
Entries: Device Forts; Beacon Hill Battery; Brackenbury Battery; Calshot Castle; Camber Castle; Cowes Castle; Dartmouth Castle; Deal Castle; East and West Blockhouses; Gravesend Blockhouse; Inventory of Henry VIII; Landguard Fort.