It is amazing how much the Philadelphia skyline has changed since the mid eighties. It is also kind of weird to think of that change in a city that is supposedly relatively stagnant and comparing it with the booming large cities of Texas, which in contrast with Philadelphia, their skylines has remained almost unchanged since the same time.
Of the top 20 tallest buildings in Philadelphia, only 7 were built before 1986, and of the top ten, ALL of them were built after 1986.
By contrast, in booming Houston, all but 3 of its 20 tallest buildings were built before 1986.
In Dallas, only 5 of the 20 tallest buildings were built in 1986 or after, with just one of them built after 1988.