https://archaeologyinbulgaria.com/2018/04/26/marvelous-10th-century-preslav-gold-treasure-displayed-after-conservation-in-germany-as-bulgarias-veliki-preslav-marks-40th-year-since-its-discovery/
Marvelous 10th Century Preslav Gold Treasure Displayed after Conservation in Germany as Bulgaria’s Veliki Preslav Marks 40th Year since Its Discovery