ESTIMATEDDate confidence: ESTIMATEDA target, not a fixed dateHow firmly the source words the date: confirmed, scheduled, estimated, delayed or unverified.Show all ESTIMATED pins65% CONFIDENCEOverall confidence: 65%How well the pin's source and references back up its dates.Weighted average of how firmly 3 references, the source included, support the pin's start and end times; a reference counts half as much for every 180 days older than the newestShow all pins from 50% to 74% confidence
English Heritage[2] and Britannica[3] date the erection of Stonehenge’s sarsen circle and trilithons to approximately 2500 BCE.Around 2500 BCE, Neolithic Britons hauled 25-ton sarsen stones about 15 miles (25 km) to Salisbury Plain and raised them into the trilithons and circle known as Stonehenge.
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