Paul Drury specialises in an archaeological approach to understanding major buildings, particularly of the 16th and 17th centuries. His interest in floor tiles originated in contextualising the products of a medieval tile factory he excavated in Essex in 1974. He has published widely and served as President of the Society of Antiquaries, 2019-2021. Christopher Norton is Emeritus Professor of Medieval Art and Architecture at the Centre for Medieval Studies and the Department of the History of Art at the University of York. He is the leading authority on medieval floor tiles in France and has published widely on medieval floor tiles on the continent and in Britain.