Source Data Reference for:
City = Harrisburg (PA-USA)
Time = 1800
| City | Year | Size | Size Comment | Year Comment | Author | Title | Location |
|---|---|---|---|---|---|---|---|
| Harrisburg (PA-USA) | 1785 | founded | n/a | http://en.wikipedia.org/wiki/List_of_North_American_cities_by_year_of_foundation | n/a | ||
| Harrisburg (PA-USA) | 1790 | 875 | n/a | http://www.wikipedia.org/ | eng2020 |