The project, completed in 2024, is accompanied by a fine volume by Arep Éditions titled “Halles, soleil, climat, cohue” (translatable as “Pavilions, sun, climate, crowd”) that looks beyond the specific case of the photovoltaic pavilion and its value as a case study, a case that remains extremely significant: what if one day not only the 1,700 square meters of its roof were to be covered with panels, but the entire roof of the Gare du Nord? In addition to taking a step forward, the volume takes a step back, tracing the building types that distinguish what in France falls under the name of “halles,” architectures for railway pavilions, markets, or trade fairs. Described as “a temple” by Charles Baudelaire, halles testify to architecture’s ability to respond to only seemingly ordinary needs with an extraordinary variety of material and technical solutions, sublimating its identity under the banner of an aptitude for adaptation toward new functions and challenges of all times.