Breuer – no stranger to precast curvilinear buildings having completed UNESCO’s World Headquarters and IBM’s La Gaude Research Centre – was well aware of their potential to maximise natural light to suites across a building. Serving as the United States Department of Housing and Urban Development (HUD) headquarters, the Robert C. Weaver Federal Building has trademark deep-set rectilinear windows and an ‘X’ plan with four arms that intersect whilst delineating independent spaces. Notably, Breuer’s design sits comfortably in the Washington DC architectural canon, typified by similarly modern, curvilinear buildings such as Luigi Moretti’s Watergate Complex.