The “Cahiers” were created in 1957 by Charles Ehresmann, under the initial title “Séminaire Ehresmann. Topologie et Géométrie Différentielle”, published in the series of the “Séminaires de l’Institut Henri Poincaré”.
Starting from Volume II, they appeared as an independent publication (edited by Dunod from 1967 to 1972), the title being changed a few times until 1966, when they were named “Cahiers de Topologie et Géométrie Différentielle” (cf. Charles and Andrée Ehresmann, « Déjà vingt ans … », Vol. XVIII-4 (1977), 431-432).
In that article it was already observed that, by taking into account the evolution of the subject, a title such as “Théorie et Applications des Catégories” would have been more suitable, since many mathematicians applying category theory to different areas of mathematics had already published in the “Cahiers”. This is the reason why, already 30 years ago (starting from volume XXV in 1984), the present name “Cahiers de Topologie et Géométrie Différentielle Catégoriques” was chosen, underlying the continuity with the origin of the journal, and also the natural change consisting in placing category theory at the centre of the research interests of the journal.
Starting from January 2015, the Editorial Board has been enlarged, by including a new generation of mathematicians and by opening the journal to some new research areas where category theory is developing and is being applied.