Never as neat or well organized as many descriptions suggest, in essence feudalism involved the exchange of grants of land for military and political… - Marilyn Stokstad

When a strong central authority protects borders and reduces internal crime, people have little need for fortified dwellings, although the rulers may build walls and towers to define legitimate residents and defend the country against external threats. When central authority breaks down, however, individuals are more likely to fortify their homes. The presence of castles in the landscape indicates a decline in stability and peace.

Before we continue our story we must stop to ask, “What is a castle?” Once a castle was defined simply as the fortified and self-sufficient dwelling of an individual feudal lord. Today we know that castles had many functions, both practical and symbolic. The castle was a new ar chitectural form—part fortress, part residence, part statehouse, part the atrical stage. Furthermore, every castle was different, depending on the wealth of the builder, the reason for the castle (control of territory, bor der, coastlines), the local geography (availability of naturally defensible sites), the knowledge of the master builder or patron, the available ma terials, the degree of urgency (speed), and finally the building traditions of the region (the techniques the workmen knew and used). In short, there is no such thing as a typical castle; a castle was a very special build ing whose form and function answered the needs of people living in Eu rope from the eleventh through the fifteenth century.

Constant warfare, especially against the Muslims, gave rise to a new type of military man—one who combined the character and role of both monk and warrior. These knights, organized into military orders, served officially under the Pope but were essentially independent. Their grand master was both an abbot and a general. They lived under a modified Cistercian rule, and they took monastic vows of obedience, poverty, and chastity. As monks, in theory they owned nothing; for example, their horses and armor were loaned to them by the order. In practice they became a wealthy and often arrogant standing army. Having studied Byzantine and Muslim castles and warfare, they built huge castles that changed castle design in Europe.