'Unprecedented' discovery of mysterious circular monument near 2 necropolises found in France

Archaeologists have discovered an unusual horseshoe-shaped monument and a collection of weapons and ornaments spanning multiple historical periods at a site in France.

Located in Marliens, a commune in eastern France, the site has a large bowtie-shaped structure, whose middle Sports a circular construction measuring 36 feet (11 meters) in diameter. This center circlet is interconnected by a 26-foot-long (8 m) horseshoe-shaped structure on one side and a jug-handle-shaped feature on the other, according to a translated statement from the French National Institute of Preventive Archaeological Research (INRAP), which carried out the excavations.

Researchers described the finding as "unprecedented," as there are no other known sites with similar shaped constructions.

Based on the plethora of artifacts found there — including a bundle containing seven flint arrowheads, two protective armbands worn by archers, a flint lighter and a copper-alloy dagger — archaeologists determined that the site was occupied during different time periods.

For instance, cut flint objects found in a nearby ditch likely date to the Neolithic period, while the weapons may be traced to the Bell Beaker culture, which emerged around 4,500 years ago, Archaeology Magazine reported.

Related: Dozens of Neolithic burials and 'sacrificed' urns and ax discovered in France

Researchers are radiocarbon dating the artifacts to pinpoint their ages, according to the statement.