Economy of Youngstown, Ohio
The economy of Youngstown, Ohio, United States, flourished in the 19th and early 20th centuries, with steel production reaching all-time highs at that time. The steel boom led to an influx of immigrants to the area looking for work, as well as construction of skyscrapers in the area.
Source: Wikipedia — Economy of Youngstown, Ohio (CC BY-SA 4.0)