"Foire à Guévaux" is a workshop organized by Denis Roueche, Florian Luthi, Charlotte Hauser and Mathieu Rivier. It took place at the castle of Guévaux, Switzerland in July 2013. This workshop invited many artists who took over the castle during two weeks to achieve different artistic projects. This impressive castle which dates back to 1757 and was ranked in Waldensian Heritage, then had opened its door during over a weekend for an exhibition of the work dones. Some projects realized during the workshop will go on to be displayed there after in different exhibitions.