I live near the Hilton Hotel in Chicago. It is the Hilton on Michigan Avenue and most people have heard of it because it is the hotel that many of the delegates to Democratic Convention were staying at when demonstrators and police clashed in 1968. At any rate, there are a series of historic hotels all along that stretch of Michigan Avenue that are of similar height. One of them is the Congress Hotel where some of y'all on this site may stay at when there is a leather (?) convention. The hotels are probably about 20 to 30 floors. So, about 2 years ago a builder/designer put in to get a permit to build a new building that would have been the 3rd tallest building in the City. That meant it would have been about 100 floors more or less. The City denied the permit finding that it was so out of proportion with the historic site line that it would ruin the historic nature of the sight. I guess a lot goes into making these types of decisions.