The stone – two metres long and 1.3 metres wide, and weighing up to three tons – was found as part of excavations of a known Bronze Age site at Breitenacher near Kehrsatz on the outskirts of Bern, said the cantonal authorities in a press release.
Judging by its size and shape, the stone is a menhir – a single standing stone, often unmarked, that was used to indicate a place of worship or meeting area.
Marks on the ground where it was found suggest the stone had once stood vertical, said archaeologists. Its placement near several Bronze Age houses could mean it played a role in the construction of the town. It could even have been used in the older Neolithic period and moved to its current site during the building of the Bronze Age town.