This YouTube video got me thinking about Johnstown, Pennsylvania

The former Cambria Public Library, Johnstown, Pennsylvania

(Now the Johnstown Flood Museum)

Now the Cambria County Library.

Johnstown's population peaked during the 1920s.  It's current population is less than it was in 1890.

Lackawanna & Johnstown: Shutdowns, Steel Towns and the Union.  (Labor Research Review, 1983)

Filmed in Johnstown.