Altar Stone
United Kingdom · built -2600
The Altar Stone is a recumbent central megalith at Stonehenge in England, dating to Stonehenge phase 3i, around 2600 BCE. It is identified as Stone 80 in scholarly articles. Its name probably comes from a 1620 comment by Inigo Jones who wrote: ‘... whether it might be an Altar or no I leave to the judgment of others’.
Monument data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).