Enjoy this collection of more than 300 vintage hand-tinted and black and white postcards from the 1900s to the 1960s, many dating to the 1940s, when a visiting author declared Pittsburgh "America's Gibraltar." Take a nostalgic tour in imagery and text of the city on the three rivers back when it was famous for its steel production and was known by all as the "Steel City." Admire its skyscrapers, churches, the arcade building, Union Station, and Mercy...