Adopting and heavily modifying an idea from Ludwig Mies van der Rohe, Philip Johnson surrounded the buildings of PPG Place with glass colonnades that create an inviting transition between inside and outside.
With computers, it is possible to make the lights on a Christmas tree an ever-changing animated kaleidoscope of movement and color. According to the laws of American taste, if it is possible, it is mandatory.
A view looking south on what used to be Market Street before PPG Place took it over. The obelisk (or the Tomb of the Unknown Bowler, as Peter Leo liked to call it) is in the middle distance.