Fort Cumberland (England)
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Fort Cumberland is a pentagonal artillery fortification erected to guard the entrance to Langstone Harbour, east of the Dockyard of Portsmouth on the south coast of England. It was sited to protect th
Interior of the fort.
A lidar view of the fort.
The distillation equipment at Portsmouth Distillery, one of the fort’s contemporary uses
Bastion
Ravelin
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A ravelin is a triangular fortification or detached outwork, located in front of the innerworks of a fortress. Originally called a demi-lune, after the lunette, the ravelin is placed outside a castle
Fort Cumberland (England)
…substantially larger in scale, enclosing an area of 24 acres (97,000 m2), and on a different alignment. It is a pentagonal fort, with five bastions and a ravelin on the western side. It was the last fort with angle bastions to be built in the United Kingdom, and the first to provide casemated ordnance. By the…
Two ravelins (top left of image) in Goes, The Netherlands
Ravelin in the Dutch town of Bergen op Zoom
Ravelin protecting the entrance of Fort McHenry, Baltimore, Maryland
The Moers fortifications, designed by Simon Stevin, where ravelins appear as triangular shapes surrounded by water, with wall (shown in dark green) facing outwards with no wall on the inner side.