In 1970s, Archaeologists in Bulgaria stumbled upon a vast Copper Age necropolis from 5th Millennium BC, containing oldest golden artifacts ever discovered near city of Varna.
Varna Culture; that emerged on shores of lakes near Black Sea some 7000 years ago.
This grave is also known as grave of golden penis, because of mysterious pure gold covering around these parts. Reason is still unknown why and whom placed these.