The program of research developed in connection with Saint-Germain at Auxerre is characterised from the beginning by a tripartite orientation, at once archaeological, architectural and historical.

Already polymorphic in its basic form, research is further conditioned by recourse to other, more specialised disciplines, which permit inquiry in other areas as called for as the project develops. One must emphasise the complementary character of these other fields of study, each of which contributes in their part to enrich and to widen the comprehension of the site.

Evidence from the soil Testimony of the written sources Lapidary evidence