Ales Stones in SE Sweden: A solar calendar from the Late Bronze Age

Ales Stones is a 67 m long stone ship in SE Sweden. It possesses strict alignments with respect to the annual motions of the Sun. It also records the months and days of the year, and the time of the day. It seems likely that it was erected as a calendar and sundial. Its age has been debated. It is now possible to assign a proper age of the erection of the monument. Several converging facts indicate an age of the Late Bronze Age of about 750-800 BC.