While the terms used to describe the tracery of medieval church windows are familiar (Early English Decorated Perpendicular) there has been no really detailed attempt to examine it as a distinct stylistic architectural form a gap which this book seeks to address. Based upon a visual catalogue of over 250 images of surviving types & styles from churches throughout England it traces the progression of ideas & the continuity of motifs & themes in tracery patterns from the thirteenth to the sixteenth centuries showing how different themes emerged within the main architectural styles; it also looks at the distinction between a windows architectural form & its tracery style & describes the several different tracery techniques. The volume is completed with a detailed glossary. Stephen Hart is a retired architect & the author of numerous works including Flint Flushwork.