Sources
- Historical Atlas of New York City, Eric Homberger, 1994
- https://www.c-span.org/video/?318362-1/american-artifacts-gilded-age-new-york
- http://www.nycsubway.org/wiki/Main_Page
- http://hyperallergic.com/
- https://en.wikipedia.org/wiki/Macy%27s
- https://en.wikipedia.org/wiki/William_M._Tweed
- https://en.wikipedia.org/wiki/Gilded_Age
- http://architecture.about.com/
- New York Historical Society
- http://www.mcny.org