“Steel City” is referring to Pittsburgh's strong history in the steel industry, is widely recognized and often associated with the city's overall identity. The city was a dominant industrial powerhouse, especially in the 19th and early 20th centuries, fueled by its abundant natural resources like coal and iron ore, and the proximity of the Allegheny and Monongahela Rivers for transportation. While the steel industry declined, Pittsburgh has since focused on technology, healthcare, and education,