Henri Labrouste is one of the few nineteenth-century architects consistently lionized as a precursor of modern architecture throughout the twentieth century and into our own time. The two magisterial glass-and-iron reading rooms he built in Paris gave form to the idea of the modern library as a collective civic space. His influence was both immediate and long-lasting, not only on the development of the modern library but also on the exploration of new paradigms of space, materials and luminosity in places of great public assembly. Published to accompany the first exhibition devoted to Labrouste in the United States - and the first anywhere in the world in nearly 40 years - this publication presents nearly 225 works in all media, including drawings, watercolors, vintage and modern photographs, film stills and architectural models. Essays by a range of international architecture scholars explore Labrouste's work and legacy through a variety of approaches.