Much evidence has been brought to light recently to demonstrate the vitality of religious life among the English laity on the eve of the Reformation. Attention has been drawn to the fact that, in the period before the advent of Protestantism, lay men and women evinced a high degree of commitment to their church. The religious changes of the sixteenth century are as pressing a historical problem as ever; moreover, they provide a valuable litmus with which to test the qualities of the late-medieval church. Nevertheless, there is a danger that the fascination of the Reformation question, together with the bias of documentary sources on lay religion towards the latter end of the medieval period, may impoverish our appreciation of the ways in which, for a thousand years, Christians in Britain had been shaping their religious lives. To take a long view of religious voluntarism may help to put the developments of the fifteenth and sixteenth centuries in a proper perspective. There has also been a tendency, in discussion of lay religious life in the late middle ages, to accept the institutional framework as given. Yet in practice that framework was both adjustable and expressive of a wide range of lay initiatives in religion. That men and women were prepared to lend material support to a variety of religious institutions is apparent from any medieval collection of wills or set of churchwardens' accounts. But what, exactly, was expressed by such support? This is not an easy question to answer. Any assessment calls for an understanding of the medieval parish, not as a legal abstraction, nor yet as a supposedly ‘natural’ community of inhabitants, but as a more or less adaptable framework shaped by, and in turn shaping, the lives of the members. The evidence of religious activity, from processions to church-building, is, so far as it goes, not hard to find. But what of the parochial structure which gave meaning to these gestures, and which could in turn be modified by them?