In the recently opened exhibition of the architectural photographs of Samuel H. Gottscho at the Museum of the City of New York , a 1930 's photo of the entrance hall in the Beekman Place home of William S. Paley , the founder of CBS , and his first wife , Dorothy , shows the drama that can be achieved by covering just one wall with mirrored glass -- especially if what 's being reflected is a languorous , curved staircase .