Swedish archaeologists made an exciting discovery during an archaeological dig on the Swedish island of Visingsö: a 12th-century grave containing buried treasure.

The Jönköping County Museum revealed the find in a press release translated from Swedish to English on March 27.

The excavation of an old church unearthed the grave, where coins dating between 1150 and 1180 were found alongside the remains of a man believed to be in his early twenties.

A total of 170 silver bracteates, thin coin-shaped pieces used as jewelry, were discovered close to the buried person’s left foot.

This find is significant to Swedish historians due to its rarity and the presence of unknown coins from that era, Fox News reported.

It is unusual for Christians of the early medieval period to be buried with a hoard of coins, adding to the mystery surrounding the discovery.

Archaeologists hope to uncover more clues as they continue to work with the find.

Eeva Jonsson, a Swedish coin expert, described the discovery as “completely sensational” and expects it to illuminate a previously unknown period of early medieval coin history in the region.

Written by B.C. Begley