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Prehistory and monuments
Is the Barrow a European Thing?
99,049 burial mounds from Ireland to the steppe, with radiocarbon dates.
This is an interactive data study by Dr Tristan Hotham, built from open data. The map runs in your browser: explore it, search for places and switch layers. The write-up explains the method and what the data shows, and the data and code are open for anyone to reuse.
More in Prehistory and monuments
Ley Lines, Tested50,822 churches, barrows, stones, hillforts and wells against random points: crowding, not planning, explains the leys.
Did Fairy Belief Protect Ireland’s Ringforts?31,431 ringforts set against barrows, enclosures and moated sites: the fairies left few fingerprints.
Still Standing6,837 buildings from before AD 1100 on one map, and what kept them standing.
Same Shape, Different MillenniaEvery stone circle in Europe's open data, sorted into traditions and dated.
The Megalith Highway13,280 megalithic monuments: did the idea of the great stone tomb travel by sea?
Within SightCould Britain and Ireland's 4,147 hillforts see each other? A line-of-sight network across two islands.