The New National Library provides public access to the national collections and functions as the repository of national literary exemplars of the Czech Republic. As an act of public architecture, the archiving of more than five million volumes presents a fundamental difficulty to the buildings public character. A conceptualization of the volumetric apportionment of the public spaces (20 percent) to the storage and operational spaces (80 percent) as a poché relationship of solid and void allows an organizational strategy of the laminar aeration of the public spaces through the mass of the libraries collections to materialize. A new spatial typology emerges which binds the public spaces through the mass of the library’s service operations and collections areas to produce a rich matrix of adjacency in staff and public operations whilst not compromising the strict programmatic separations required by the function of a large institutional library.