The most important issue in human existence and survival is the safety and security, came to build castles as an expression and reflection honest to this issue in detail, on the one hand, the cumulative product met the experiences and melted in which all values of the most important urban civilization landmarks on the other hand, of its art defensive large, high architectural taste. This research deals with the study of the concept of castles reviewing phases of architecture throughout history, then an explanation for classification, types and importance and finally made the social and geographical dimension of the castle and concludes to establish a set of results for subsequent research in the future.