Keep the map running

• Map tile and API hosting — serving historical border snapshots and place data at speed, for every visitor.
• The data pipeline — the scripts that fetch, verify, and cache Wikidata/Wikipedia content and keep it up to date.
• Time spent researching and fixing border errors, broken links, and factual corrections readers report.

A one-time or monthly tip, whatever it’s worth to you — no account, no subscription required.

Some “further reading & viewing” suggestions on people, places, and tours may in the future link to booksellers, documentaries, or museum tickets through affiliate programs — if you buy through one, we may earn a small commission at no extra cost to you. See the full disclosure in the Terms of Use. Support and affiliate links never change what borders, dates, or facts the map shows.