We usually associate monasteries with the Middle Ages. Monks, nuns, friars and canons played a fundamental role throughout this millennium, both in religious, cultural and economic life. There were different forms of monasticism, both male and female, from the diversity of the early Middle Ages to the establishment of religious orders, and monasteries were an articulating element of society, from the aristocracy to the peasantry. The desire to attain the perfection of Christian life clashed with the adaptation to society, in a tension that took the form of scandals and reforms. The relationship with the laity, between protection and abuse; the attitude to teaching and written culture; the different ways of organising the life of the monastic community; intercessory prayer for the living and the dead; and the tensions with bishops and secular clerics, all marked the evolution of the monastic life.