A rare and valuable ring has been found during the National History Museum's (NIM) regular archaeological excavations at the Kokalyanski Urvich Fortress' citadel. The archaeological team, led by Dr Filip Petrunov (National Archaeological Institute with Museum with the Bulgarian Academy of Sciences)and Violina Kiryakova (NIM), believe the silver ring with gold plating belonged to an aristocrat from the second half of the 14th century, the National Archaeological Institute said.
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