The FSG has built up a large number of resources on fortifications and related matters.  Many  are available to the general public; others are reserved for members. 

Click on one of the categories on the left to filter for different types of resources; more recent ones are at the top of the listings older ones further down.

Click here to access the Members' Directory.

The Fortress Study Group CIO is a registered charity, No 1194017.
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