Crusader castles have been the subject of academic study for well over a century but the castles constructed by Muslim powers in greater Syria have been comparatively neglected. This series of studies looks at key developments and monuments in the history of Muslim military architecture in Syria from its beginnings under the Umayyads (661-750) down to Ottoman times. These studies range from ground-breaking archaeological studies to wide-ranging analysis of broader trends. The work is fully illustrated with photographs and plans, most of them never published before.