Guy Bloch-Champfort, journalist, is a specialist in decorative arts of the 20th century and the work of Joan Mitchell. Collaborator of Connaissance des Arts, AD, he is the author of numerous works including Rapahaël, decorator, Éditions de l'Amateur, 2002, and Décorateurs des années 60-70, Éditions Norma, 2015. Guy Antoine Rozès is a photographer, specialising in architecture, decoration and heritage. Sophie Cambrillat is an architect. She is a lecturer at the University of Rouen. Tanit Quillé, daughter of Henri Quillé, is an architect.