Yes. The first floor is accessible to the public 7 days a week from the hours of 9 A.M. - 5 P.M. I believe that there may be tours on Saturdays at 10:A.M.
What architecture is
Only the first floor landing and the adjoining subway restaurant are open to the public. You can have your picture taken in the Otis elevator. You can ascend the staircases to the 2nd landing. These are limits of public access and they are enforced.
Yes
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