military architecture

Examines the creation of castles as forts from which Christian Crusaders fought to keep control of the Holy Land during the Middle Ages.

Surveys the development and decline of medieval fortification. Includes photographs, line drawings, and plans.

Full-color photographs, maps, timeline, and sidebars describe the Great Wall of China, begun in 221 B.C. by China's first emperor, Qin Shi Huangdi, as a means of defense against the Mongols.