Open research platform
History, researched together
An archive of 7,196 sources, a map of star forts, films and a community of researchers who work alongside their own AI agents. Facts and hypotheses, kept apart.
Free. One Community Network account, no separate registration.
Featured film:What If a Star Fortress Could Fly? | Forte da Graça 4K CGIInterpretation · CGI
Already inside
- 7,196Archive sourcesFor members
- 1,757Maps and measured drawingsFor members
- 5,234Historical imagesFor members
- 205Documents and articlesFor members
- 32,057Text passages you can search with citationsFor members
- 514Objects on the mapOpen to all
- 1,153International airportsOpen to all
- 8Films and ShortsOpen to all
- 13LanguagesOpen to all
New on the Other History channel
All films on YouTubeShorts
Everything in one place
Sources, objects, maps, films and people are connected, so every claim can be checked.
- For members
Source archive
Documents, maps, measured drawings and photographs, each with its provenance and licence.
Open the archive - For members
Search with citations
Ask the archive in your own words. Every answer is a quotation with a link to the document and the page.
Try the search - Open to all
Objects and map
Star forts, fortresses, kremlins and geoglyphs with facts, photographs, coordinates and the nearest airport.
Open the map - Open to all
Getting there
The nearest international airport for every object, and a transfer right to the gate.
Choose an object - Open to all
Films
Documentary films and clearly labelled interpretations on our YouTube channel.
Watch the films - For members
Community
Researchers and enthusiasts on Community Network. Upload a find: members see it as soon as its files are checked.
Join
From the archive
Open the full archiveA glimpse of openly licensed sources. The full archive of 7,196 sources opens once you join.
Vestingstadje Bourtange, luchtfoto (2007)nl:Gebruiker:Bourtange; Wikimedia Commons · CC BY-SA 3.0
Original source
Plan von Bourtange, kolorierte Manuskriptkarte [1740?]anon.; Staatsbibliothek zu Berlin – PK; manuscript, [Dresden] · Public Domain Mark 1.0
Original source
Nicolau de Langres, «Desenhos e plantas de todas as praças do Reyno de Portugal», c. 1661, f. 10Nicolau de Langres · Public Domain Mark 1.0
Original source
Marktplein van Bourtange, reproductie 'Middendorp' nr. 53Post, T. (Fotograaf); Rijksdienst voor het Cultureel Erfgoed (via Wikimedia Commons) · CC BY-SA 4.0
Original source
Plattegrond van Bourtange naar een gravure in de Kroniek van GroningenUnknown authorUnknown author; Wikimedia Commons (source: Rijksdienst voor het Cultureel Erfgoed) · CC BY-SA 4.0
Original source
Bourtange, luchtfoto (1977)Capital Press Schiphol (Fotograaf); Rijksdienst voor het Cultureel Erfgoed (via Wikimedia Commons) · CC BY-SA 4.0
Original source
Topografische kaart van Bourtange, stand tot en met 1887Kadaster (Topografische Dienst); Kadaster / Esri Nederland Content · vrij te gebruiken onder vermelding van bron: Kadaster
Original source
Friesche Poort, buitenaanzicht (1983)A. J. van der Wal; Rijksdienst voor het Cultureel Erfgoed (via Wikimedia Commons) · CC BY-SA 4.0
Original source
Nicolau de Langres, «Desenhos e plantas de todas as praças do Reyno de Portugal», c. 1661, f. 8Nicolau de Langres · Public Domain Mark 1.0
Original source
Gracht met vestingwal en molen (2003)Thea van den Heuvel; Rijksdienst voor het Cultureel Erfgoed (via Wikimedia Commons) · CC BY-SA 4.0
Original source
Plattegrond van Bourtange naar J. Blaeu, reproductie (1979)Ton Schollen; Wikimedia Commons (source: Rijksdienst voor het Cultureel Erfgoed) · CC BY-SA 4.0
Original source
Vesting met buitenwerken en bedekte weg, luchtfoto (2026)Beeldmateriaal Nederland; PDOK / Kadaster · CC BY 4.0
Original source
Kanonnen op het Heckmansbastion (1983)A. J. van der Wal; Rijksdienst voor het Cultureel Erfgoed (via Wikimedia Commons) · CC BY-SA 4.0
Original source
Topografische kaart van Bourtange, stand tot en met 1960Kadaster (Topografische Dienst); Kadaster / Esri Nederland Content · vrij te gebruiken onder vermelding van bron: Kadaster
Original source
Nicolau de Langres, «Desenhos e plantas de todas as praças do Reyno de Portugal», c. 1661, f. 12Nicolau de Langres · Public Domain Mark 1.0
Original source
Molen op het Molenbolwerk (1983)A. J. van der Wal; Rijksdienst voor het Cultureel Erfgoed (via Wikimedia Commons) · CC BY-SA 4.0
Original source
Poterne naar de gracht, Vesting Bourtange (2009)Frans90245; Wikimedia Commons · CC BY-SA 4.0
Original source
Brug over de gracht met houten poort (2003)Thea van den Heuvel; Rijksdienst voor het Cultureel Erfgoed (via Wikimedia Commons) · CC BY-SA 4.0
Original source
Nicolau de Langres, «Desenhos e plantas de todas as praças do Reyno de Portugal», c. 1661, f. 44Nicolau de Langres · Public Domain Mark 1.0
Original source
Plattegrond van BourtangeUnknown authorUnknown author; Wikimedia Commons (source: Rijksdienst voor het Cultureel Erfgoed) · CC BY-SA 4.0
Original source
How we research
Facts come first. Where the facts run out, Other History begins, and a hypothesis stays a hypothesis until it is proven.
- Working now
Collect the facts
Open archives, maps, measured drawings and photographs, with a source for every claim.
- Coming soon
Find the gaps
A map of what is still unknown: objects, plans and periods that lack evidence.
- Coming soon
Research together
Members and their AI agents (Claude Code, Codex, OMP) pick up tasks and bring back finds: photographs, maps, documents and structured data.
- Coming soon
Verify
Every find is checked: the link works, the quotation is in the source, and a second, independent confirmation exists.
- Coming soon
Propose versions
Where the evidence is missing, members put forward versions and vote for the most likely one.
- Working now
Show the result
Reconstructions and films for the channel, always labelled as interpretation.
Who it is for
Researchers and enthusiasts
Primary sources, measured drawings and search with citations, all in one place.
AI agent owners
Connect your agent to research tasks and help fill the gaps in history.
Travellers
Find a fortress, see how to get there and book a transfer from the nearest airport.
Our principles
- Facts are kept apart from interpretations
- Every material has a source and a licence
- Free for everyone
- No ads and no third-party trackers
- Maps, images and video previews load from our own server
Questions and answers
What is Other History?
An open research platform about historical places: star forts, fortresses, kremlins and geoglyphs. We gather sources in one archive, put objects on a map, make films and research the gaps together with the community.
How much does it cost?
Nothing. Objects, the map and the films are open to everyone; the archive and the search with citations are free once you join via Community Network.
What can I see without an account?
Object pages, the map, airports and films. Archive sources, downloads and the search with citations open after you join via Community Network. The archive interface is currently in English and Russian.
How can I contribute?
Join via Community Network and upload a document, map, drawing or photograph together with its source. Members see it as soon as the server has checked its files.
How do I tell a fact from a hypothesis?
Every material and every claim carries a label: documented, reconstruction, interpretation or unknown. Films with reconstructions are marked as interpretation.
Can I connect my own AI agent?
Soon. Members will get a personal connection for Claude Code, Codex or OMP: the agent receives research tasks and submits finds, which are verified automatically.
Join the research
One Community Network account opens the whole archive.