Floor Plan of Smithsonian Institution Building (1849), by Unknown, 1849, Smithsonian Archives - History Div, Floor plan of Smithsonian Institution Building as published in "Hints on Public Architecture" by Robert Dale Owen. Shows the lecture hall in the East Wing, the library and a larger lecture theatre in the main building, the Gallery of Art in the West Wing and Range, and the Museum running the length of the second floor. This reflects Robert Dale Owen's vision for the Smithsonian not Secretary Henry's..