Yves Arnod and Isabel Hérault have co-founded their agency in 1991, and ever since they have conceived and realised many buildings, the majority issued by a public order. The agency works on very varied programs on different scales, refuting any idea of specialization. Each time the will to escape from the already-made solutions or the transposition of receipts leads them to propose relevant and original answers which draw their substance from the reality of a situation. They are very attentive at the milieu in which a project situates itself in order to find each time the right answer to the specificity of a context. It is a question “of revealing the forces, energies involved rather than forcing the things” (Deleuze). This way of thinking aims to a work starting from the medium produced by projects very different from each other, the recurrence being in the process rather than in the result. The agency has many references in the cultural field, among which: theatre (at Les 2 Alpes, delivered in 2005 or Anglet in progress), concert hall (at Grenoble, Evreux or Brest), recording studios and rehearsal rooms (Métaphone at Oignies, which will be delivered in 2012, Concert Hall for electronic music in Grenoble), media library and cinemas (at Meyzieu, delivered in 2001), museums (archaeological museum of Paladru), skating rinks and spectacle halls (in Grenoble, delivered in 2001 and to Chalons-en-Champagne, delivered in 2005), etc. The agency develops along with its projects a reflection on the sustainable development, whether required or not by the client. The data of a situation makes it possible to develop this more or less in detail according to the program, the site and the budget. Beyond the technical aspects related to the energy saving or the constructive modes, the question of interaction between architecture and nature is unceasingly put, in the projects relate to the landscape, but also to the urban contexts, where the relation between the man and the elements - light, sky, seasons, air… is of primary importance. Herault Arnod concern to respect their engagements and had developed a working method which aims to the strict control of the costs, schedules and the quality of the realization: their creativity and architectural research that they follow exerts inside this framework.