How big is the building one of the largest in the world is in?
New York State Museum:  Formerly located in the State Education Building, the museum now occupies the first four floors of the Cultural Education Center, a ten-story, 1500000 sqft building that also houses the New York State Archives and New York State Library. New York State Library:  The library is one of the largest in the world by number of items held, with over 20 million.
i don't know