Originally built in 1901 Nippert has seen many changes over the years. Amazing story, James Nippert was injured during a game and later died, his grandfather, James N. Gamble of Procter & Gamble, donated the required funds to complete the stadium.
The stadium probably hasn't seen change like the changes happening now. Close up the new structure for the press and luxury suites is massive, more massive than they look from the usual vantage points across the field. Fun fact I learned, the official project cost is $85 million. But that was before the board of directors tacked on everything from their wish list so no one really knows what it is going to cost.
There used to be offices, locker rooms and class rooms under the stadium. Back then it was above ground, but now bricked up windows are more than 12' underground now.