Pittsburgh had been a vital part of the great steel belt of US, being rich in coal. Most of the old buildings bear the testimony of the resulting high levels of pollution in the city. Even this church at Negley. You can cleary see the black deposition on it wall. Seeing the marks pollution on these old buildings, it is understandable why the Kauffmann's were desperate for a retreat out in the woods, and wanted the house to truely connect with nature
1. Falling Waters
2. Cathedral of Learning: University of Pittsburgh
