Sources and credits — Panchronica

Sources, licences and credits

Panchronica is built almost entirely on open data, and every source below is credited on the page where it is used as well as here.

What	Source and licence
Historical borders the coloured territories at every year	historical-basemaps by André Ourednik and contributors, under the GNU General Public License v3.0. The slices are reconstructions and are labelled approximate throughout.
Rivers, lakes, landforms and the shaded relief	Natural Earth. Natural Earth states that all its raster and vector map data is in the public domain and that no permission or credit is required — we credit it anyway. The relief on our map is built from their Shaded Relief (SR_HR) raster and served from our own servers, so the site depends on no third-party tile service.
Records: names, dates, coordinates, identifiers	Wikidata, whose structured data is released under CC0 1.0 (see Wikidata:Licensing). Every such record shows its Wikidata identifier and links back to it.
The descriptive paragraph in a popup	First paragraphs from Wikipedia, shown verbatim with a link to the article. Wikipedia text is licensed under CC BY-SA 4.0 and co-licensed under the GNU Free Documentation License (Wikipedia:Copyrights). Our own curated prose does not reproduce it: Wikipedia is sometimes one of the sources we consult, but we write in our own words (see how our content is checked).
Pictures	Wikimedia Commons. Commons has no single licence: every file carries its own, stated on its file description page (Commons:Licensing). So every picture here is shown with its author, its licence name linked to the licence deed, and a link to its Commons file page. A picture whose credit is incomplete is not displayed at all.
Recordings	Also Wikimedia Commons, under the same per-file rule, and hotlinked from Commons rather than re-hosted. Each track shows its performer or uploader, its own licence and its file page. Licences in use range from public domain through CC0 and the CC BY / CC BY-SA family; some tracks are computer renderings rather than human performances, and say so. Where the music is still in copyright and no free recording exists, we say that instead of playing something misleading.
Map rendering	MapLibre GL JS 4.7.1, under the 3-Clause BSD licence, which also carries bundled third-party notices (mapbox-gl-js v1.13 and earlier, BSD-3-Clause; glfx.js, MIT; d3-color, BSD-3-Clause).
Category icons	Tabler Icons by Paweł Kuna, MIT licence (full text ships with the site at /icons/LICENSE-tabler.txt).
Typefaces	None are loaded. The site uses whatever serif and sans-serif your device already has, so nothing is fetched from a font service and nothing is tracked by one.

Our own writing — the overviews and the curated entries — is © Panchronica. Please ask before you use it. For everything else, check the licence of the specific item: a picture, a recording and a paragraph on the same popup can each be under different terms, and each one names its own.

If you believe something here infringes your rights, or a credit is wrong or missing, use the Report an error link and we will correct or remove it.

Sources for our articles

These are the sources we used for our written overviews, listed by subject. The list grows as we check more of the content.

Afanasevo Ancient Egypt Ancient Levant Arameans Armenia Austria Austronesians Azerbaijan Belgium Brazil Byelarus Byzantium China Congo Croatia Czechoslovakia Ethiopia Florence France Germany Greece Habsburg Monarchy Holy Roman Empire Hungary India Islamic Middle East Italy Japan Judea Kazakhstan Koreans Kyrgyzstan Lombard Italy Madagascar Mesopotamia Mexico Minoan Crete Moldova Naples New Zealand Papal States Peru Polynesia Serbia Slovakia Spain Sri Lanka Switzerland Taiwan Tajikistan Thrace Turkmenistan United States Uruguay Uzbekistan Vietnam West Africa