Some of the earliest Viking "pennies" were made with silver that contained melted-down coins from the Islamic world, a new study reports. The finding confirms the relationship between early Viking and Islamic silver, which was likely the result of long-distance trade.

The silver coins make up the Damhus hoard, a trove of 226 Viking Age pennies found near the town of Ribe on Denmark's Jutland Peninsula in 2018. The trove dates to between A.D. 830 and 850, which makes the silver pieces some of the earliest Viking coins ever discovered, according to the study, which was published June 5 in the journal Archaeometry.