Cartophiles rejoice — the NYPL recently made over 20,000 historical maps from its database free to access, download, and use. The librarys Lionel Pincus Princess Firyal Map Division created an entire website called Map Warper where users can create an account and access all the maps, which are available courtesy of Creative Commons. Many of the maps detail New York City from 1852 to 1922, but there are also unlikely collections from the mid-Atlantic United States and the Austro-Hungarian empire. …