OpenHistoricalMap

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OpenHistoricalMap goes beyond the present, mapping places throughout the world… throughout the ages.
No community is too small, no story too obscure to add to this map.
Everyone has something to contribute, including you!



Contribute

To contribute to OpenHistoricalMap, go to the main map, zoom in to a place of interest, and click the “Edit” button. If you are familiar with editing OpenStreetMap, the OpenHistoricalMap editing experience is very similar. See the tagging guidelines for information on a few changes we’ve made to accommodate the time dimension.

We also maintain several software projects to facilitate map contributions and data reuse. Please report any issues and send us your ideas on GitHub or our forum.

Then and now

From OpenHistoricalMap's community projects:

Left: The Venetian star fort of Palmanova in 1600. Right: The same location today.

On this day

Selected establishments and disestablishments on October 6:

1887
Kansas City's Exposition Building opens.
1908
Austria-Hungary announces the annexation of Bosnia and Herzegovina from the Ottoman Empire, starting the Bosnian Crisis.
1939
Germany and the Soviet Union gain full control of Poland after the latter's defeat in the Battle of Kock.
2002
A stained glass window celebrating Queen Elizabeth II's golden jubilee is unveiled in British Columbia's parliament building in Victoria.
2006
A Uniqlo store opens in Osaka, Japan.


Statistics
  • 2M
    dated elements
  • 504k
    buildings
  • 360k
    railroad miles
  • 125
    average age
  • 1938
    average year
  • 1,795
    contributors
News
August 11, 2025
Vespucci adds built-in support for editing OpenHistoricalMap.
April 27, 2025
OSM Building Viewer adds support for rendering an OHM building in 3D.
April 17, 2025
OpenRailwayMap has added a time slider and replaced OpenStreetMap demolished railways with OpenHistoricalMap data.
April 15, 2025
Follow our new Bluesky account.
April 10, 2025
The Nominatim API has moved to a new subdomain for consistency with OpenStreetMap.


Events
November 14, 2025 – November 15, 2025
State of the Map Europe in Dundee, Scotland
November 12, 2025 – November 13, 2025
Unicode Technology Workshop in Mountain View, California
October 16, 2025 – October 19, 2025
WikiConference North America in New York City
October 15, 2025 – October 18, 2025
North American Cartographic Information Society Annual Meeting in Louisville, Kentucky


Policies and guidelines