Robert Siegel Architects was selected to provide building and theater design by Capital One’s interior design architect, Macini Duffy Architects. The project included the addition of 27,000 square feet to Capital One’s corporate headquarters as well as renovations to adjacent existing office buildings. New facilities include a 400 seat auditorium, conference rooms, a winter garden, cafe, and support spaces.The curvilinear form of the addition, on a narrow site, plays against the existing bow-shaped office tower and formal, circular vehicular forecourt. We developed the design to create a flexible lecture hall capable of handling audiences between 50 and 400 people. The winter garden provides required pre-theater staging area and has subsequently become the social heart of the building. Its lush greenery, running water, and intimate lighting levels provides a quiet respite from the office tower and road noise of the adjacent beltway.A steel frame is used for the primary structure, and the auditorium is designed to be acoustically isolated, using structural concrete, as a building within a building. The exterior materials of cast-in-place concrete and precast wall panels match the materials used elsewhere in the headquarters complex. The warm glow of lighting from the skylight and glazed wall of the winter garden provide a lantern to be seen across the open fields.