The first half is a brief history of the church in medieval Scotland, centred on its buildings and their roles. This looks in turn at cathedrals, monastic foundations, and parish churches and chapels, and is illustrated with building plans as well as photographs. The second half is a period by period architectural history, progressing from the earliest remains through Anglo-Scottish Romanesque and Early, Mature, and Late Gothic. The focus here is more on the smaller-scale features of buildings and on stylistic links between specific buildings (both within Scotland and outside) and their patrons and masons. A brief final section looks at the effects of the Reformation, both on the buildings — many were abandoned or modified — and on architectural style, where the pause in building activity resulted in a real, if partial, discontinuity.