The essays in this volume reflect on and build on the remarkable legacies of Robert Mark and Andrew Tallon, who pioneered the application of high-technology research methods to the study of Gothic architecture. Combining personal reminiscences and historiographical discussions with meticulous geometrical and structural analyses based on photogrammetric and laser-scanned building surveys, this book offers valuable new perspectives not only on Mark and Tallon themselves, but also on major churches including the abbeys of Saint-Denis and Alcobaça, Santa Maria Novella in Florence, Notre-Dame...