The rotunda of Penn Station is such a remarkable structure that it has its own separate listing with the Pittsburgh History and Landmarks Foundation. The skylight is a fine example of abstract geometry in metalwork.
The current owners of the Pennsylvanian hate photographers and tourists who come up to see the rotunda, and post signs on the walk up to the rotunda warning that this is private property and no access beyond this point and, with dogged specificity, NO PROM PHOTOS. But old Pa Pitt walked up through the parking lot, taking pictures all the way, and therefore saw the signs only on the way back. Sorry about that, all ye fanatical upholders of the rights of private property, but these pictures have already been donated to Wikimedia Commons, so good luck getting them taken off line.
The four corners of the earth, or at least the four corners of the Pennsylvania Railroad, are represented on the four pillars of the rotunda.
“Pittsburg” was the official spelling, according to the United States Post Office, when the rotunda was built in 1900.