The recent discovery of two silver coins from the Roman Empire on a remote island in the Baltic Sea, located halfway between Sweden and Estonia, has left archaeologists both baffled and excited.

The discovery was made by a team of archaeologists from Södertörn University in Stockholm, who found the coins using metal detectors in March, Live Science reported.

The coins were discovered at a beach site on the island of Gotska Sandön, which is marked by old fireplaces.

The origins of the coins are unclear, but some speculate that they may have been left by Norse traders, lost in a shipwreck, or brought to the island on a Roman ship that voyaged to the far north.

The discovery of two Roman “denarii” coins on the remote island of Gotska Sandön in the Baltic Sea has left archaeologists both excited and puzzled.

The coins, one from the reign of Trajan and the other from the reign of Antoninus Pius, each weigh less than 4 grams and were likely worth a day’s pay for a laborer at the time they were minted.

Although it is unclear how they got there, they could have been left by Norse traders, lost in a shipwreck, or brought to the island by a Roman ship that sailed to the far north, as reported by Live Science.

Johan Rönnby, an archaeologist at Södertörn University, suggests that these coins could have been in circulation for a long time due to their valuable silver content, and were possibly brought to the island by Norse traders seeking shelter during storms at sea.

Written by staff