OpenHistoricalMap

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!

Go to the map • Learn more…

Use

Go to the main map and navigate to a place and time of interest using the time slider. Share the map to spread the word about our project. Explore the many ways you can reuse OpenHistoricalMap in your own storytelling and software projects.

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. 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 July 4:

1800: In the United States, the Indiana Territory is created from the Northwest Territory.
1848: Mexico cedes territory to the United States under the Treaty of Guadalupe Hidalgo.
1856: An equestrian statue of George Washington is dedicated in Union Square in Manhattan, New York City.
1935: The Derby Canal is closed in Derby, England.
1946: The Philippines gains independence from the United States under the Treaty of Manila.
1957: Sixteen trees are felled in Dreux, Eure-et-Loir, France.
2000: A monument to Kurmangazy Sagyrbaev is dedicated in Astrakhan, Russia.

Statistics

3.6M
dated elements
745k
buildings
593k
railroad miles
97
average age
1960
average year
2,149
contributors

Source: Overpass API, Overpass API, Planet
July 2, 2026

Historical statistics

News

April 16, 2026: The official vector tilesets are now available as TileJSON.
April 15, 2026: Our tagging pages more consistently link to other OHM tagging pages instead of often conflicting OSM tagging pages.
April 14, 2026: The tile server has migrated from Tegola to Martin for improved reliability and performance.
April 1, 2026: OpenHistoricalMap Quality and Coverage Stats is a new dashboard for tracking common errors in OHM data.
February 20, 2026: JOSM’s Changeset Viewer plugin adds support for OHMCha.