The artistic society known as "Groupe de Saint-Luc" left its mark on the artistic and cultural heritage of Switzerland, in particular French-speaking Switzerland, throughout the inter-war period. Based on in-depth research into the abundant archival sources produced by the Society and its members, this publication proposes a re-reading of this major artistic phenomenon of the first half of the 20th century, from a plural perspective that combines history, sociology and history of forms in art and architecture. It aims to take the "Groupe de Saint-Luc" out of isolation and set it within a broad European field of action, in which the issues of architecture and modern art, the opening of religious circles to modernity, and the relationship between the Church and artists are intertwined.