[Vigilanteman]

Interesting stuff. The US Steel sign and logo is, of course, what is visible from ground level. The UPMC logo is on the top and what you see from a distance or flying low over the Burgh. The shorter Mellon Tower is shown in the background here:

There was a time when the Mellon name in Pittsburgh was like the Kennedy name in Boston. Whatever they wanted; they got.

[HamiltonJay]

Fifth Avenue place is actually 1’ taller than Mellon Tower (both were built around the same time).... but both are a little more than 100’ shorter than the Steel Tower...

[HamiltonJay]

The tower has NEVER officially called anything but USX or USSteel or Steel Tower.... basically if a building has signage on it, that’s whoever has the largest lease in the building... goes with that.. but it doesn’t rename the building.

Just like William Penn Place has “Citizens Bank” on the building, but the building is still William Penn Place.

Or there is the Huntington sign on the Grant Building, but the building has never been called anything but the Grant Building....