100 Fifth Avenue
Wheelchair Accessible: Yes
Restrooms Available: Yes
The name does not come from the gemstone or someone named Diamond–it comes from Market Square, which was not always
called Market Square!
A docent will be on-site to tell you the rest of this story, as well as point out some of the architectural features of this building.
Construction started in 1904 and the building opened in April 1905. Designed by MacClure and Spahr, a Pittsburgh firm that gave us several other distinguished buildings, including the Union National Bank building on Fourth Avenue in Pittsburgh’s Financial District. The Diamond Bank became Pittsburgh National Bank, which in turn became PNC. It still stands as an office building, no longer owned by PNC, even as skyscrapers crowd around it.