In this April 13, 2018 photo an archeologist holds an ancient Danish coin which was minted under King Harald Bluetooth after a medieval silver treasure had been found near Schaprdoe on the northern German island of Ruegen in the Baltic Sea. A 13-year-old boy and an amateur archaeologist have unearthed a “significant” trove in Germany which may have belonged to the Danish king Harald Bluetooth who brought Christianity to Denmark. [Photos: Viking-Age Fortress Unearthed in Denmark]

"This trove is the biggest single discovery of Bluetooth coins in the southern Baltic Sea region and is therefore of great significance," the lead archaeologist, Michael Schirren, told the German news outlet DPA, according to The Guardian. When amateur archaeologist Rene Schön and his 13-year-old sidekick Luca Malaschnitschenko found a shiny piece of metal on a treasure hunt near Schaprode on the German Baltic Sea island of Rügen three months ago, they initially thought they had merely spotted a piece of tinfoil. The German Press Agency (DPA) gives report of an amateur archaeologist and his 13-year-old student who discovered the treasure trove of buried silver; believed to having been buried by the 10th century King Harald Blåtann (King Bluetooth). (Stefan Sauer/dpa via AP)

In this April 13, 2018 photo hobby archaeologist Rene Schoen and 13-year-old Luca Malaschnitschenko, right, search for coins after a medieval silver treasure had been found near Schaprode on the northern German island of Ruegen in the Baltic Sea.
Archaeologists announce the discovery of a treasure haul potentially linked to 10th Century Danish King Harald Bluetooth in Rügen, Germany. The initial finds were made by amateur treasure hunters in January and the total haul is the largest of its type.