For people named Castle, see
Castle (surname) A
castle is a fortified structure used to defend a territory; see also,
List of castles.Castle or Castles may also refer to:
University College, Durham, commonly known as "castle"Operation Castle, a series of nuclear tests conducted in 1954
Castle Bravo, its first test
GWR 4073 Class, the "Castle" class of steam locomotive
Castle class corvettes, the follow on to the Flower class corvette of World War Two
Castles (estate agents), in the UK
Castle Project, an application framework for the .Net platform
Castle Building Centres Group Ltd., Canadian retailers of lumber and building materials
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