On May 28, 2011, at a ceremony organized by the Rectorate of the University and the Dean's Office of the Faculty of Letters and Humanities of Neuchâtel, a volume of mélanges was presented to Professor Denis Knoepfler, by Mr. Nathan Badoud, member of the École française d'Athènes, scientific editor of the work published by Éditions Droz, Geneva-Paris. Under the title Philologos Dionysios, this collection includes, in addition to a complete bibliography of the honorandus, studies in Greek epigraphy and history by twenty-four of his students and former assistants at the Collège de France. The preface by Pierre Ducrey, who also spoke at the ceremony, includes a previously unpublished letter from Louis Robert to the Swiss hellenist Olivier Reverdin, dated July 1, 1969.