Counterscarp Gallery 


Southsea Castle 
Portsmouth Fortifications
View across the moat with counterscarp gallery visible
The counterscarp is the outer slope of the moat. A gallery built into this face could bring fire upon attackers crossing the moat or scaling the walls. 
In Southsea Castle the openings of the gallery can be seen in the counterscarp wall. The tunnel running around the galleries is linked by a bomb proof passage (caponier) linking the front of the fort with the counterscarp.
 
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