Including previously unpublished and little known material, this cutting-edge book presents a detailed discussion of the archaeological evidence of the five military orders in the Latin East: the Hospitallers; the Templars; the Teutonic Knights; the Leper Knights of St Lazarus; and the Knights of St Thomas. Discussing in detail the distinctive architecture relating to their various undertakings (such as hospitals in Jerusalem and Acre), Adrian Boas places emphasis on the importance of the Military Orders in the development of military architecture in the Middle Ages. The three principal sections of the book consist of chapters relating to the urban quarters of the Orders in Jerusalem, Acre and other cities, their numerous rural possessions, and the tens of castles built or purchased and expanded in the twelfth and thirteenth centuries. A highly illustrated and detailed study, this comprehensive volume will be an essential read for any archaeology student or scholar of this period.