The Prudential Building was the tallest building in Chicago the year my 4th grade class took a field trip to downtown. I'd never been in a plane before, and it would be years until, but there from the 42nd floor I could see all over the city and even all the way across Lake Michigan, the shoreline, everything. I was smitten. These days when I visit there are buildings way taller, but the Prudential Building, with the Rock of Gibralter on its face- I go in and try to see across to 1964 and me.