As Ordens Militares em combate nos finais da Idade Média: o caso da Guerra da Sucessão de Castela (1475-1479) by António Carlos Martins Costa

“…In the late fifteenth century, distant was the context of the emergence of the Military Orders, which occurred in the Classic Middle Ages, when Cluny diffused the ideal of a strong monasticism, chivalry was established as christianized group and the Crusade sought the freedom of holy places and the removal Islamic threat about Christianity. …”
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Sacral buildings suitable for defense purposes and their ensembles in Vilnius in the 14th-18th centuries by Linas Girlevičius

“…Thus, we can conclude that quite a number of the sacral monuments of Vilnius were ready to be used for defense purposes during battles.  Monasteries were suitable for defense due to their planning — traditionally an enclosed ensemble of buildings. …”
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