In 1547–8, an inventory was made of crown possessions and this details the cannon and hand-arms of each fort.
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The Device Forts, also known as Henrician Castles, are a series of artillery fortifications built to defend the southern coast of England by Henry VIII.
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Portland Castle is one of the Device Forts, also known as Henrician Castles, built in 1539 by Henry VIII on the Isle of Portland to guard the natural Portland anchorage known as the Portland Roads.
Sandown Castle was one of Henry VIII's Device Forts or Henrician Castles built at Sandown, North Deal, Kent as part of Henry VIII's chain of coastal fortifications to defend England against the threat of foreign invasion.
Sandsfoot Castle is one of Henry VIII's Device Forts, also known as Henrician Castles, built around 1541 to the west of Weymouth, Dorset, England, opposite its contemporary Portland Castle.