John Eisenmann / Boston Township Hall

Historical marker location:

1775 Main St, Peninsula, Ohio

( Marker is on Main Street (Ohio Route 303) just east of Riverview Road (County Route 9), on the left when traveling east.)

Marker installed: 2011

(1851-1924) / .

Ohio played a key role in the development of the modern steel industry. Andrew Carnegie, one of the most famous industrialists of the late 19th and early 20th centuries, started his career in the steel industry in Pittsburgh, Pennsylvania, but his first major investment was in a steel mill in Braddock, Ohio.