Notably, Allegheny County, Pennsylvania contains the first Carnegie libraries ever donated by the philanthropist, owing to his personal connection to the Pittsburgh area.
Architectural Critic Patricia Lowry calls them "Pittsburgh's most significant cultural export".
[1] Five out of the first seven, six of the first ten, and seven of the first twelve libraries that Carnegie commissioned in America are in Allegheny County.
Also, eleven of the first fourteen Carnegie funded libraries to open in America were in Allegheny County.
[2] Download coordinates as: 40°00′51″N 75°11′31″W / 40.014201°N 75.191874°W / 40.014201; -75.191874 (Falls of Schuylkill Library) Land gift of Lower Dublin Academy[13] Note: The above references, while all authoritative, are not entirely mutually consistent.