medieval military architecture, Crusades, fortification
1 The influence of Smail's study
Chevedden, Paul E.
"Crusader Warfare Revisited: A Revisionist Look at R. C. Smail's Thesis: Fortifications and Development of Defensive Planning,"
Quidditas: Vol. 14
, Article 3.
Available at: https://scholarsarchive.byu.edu/rmmra/vol14/iss1/3