The tomb in Zlatinitsa, 180 miles east of the capital Sofia, is also extraordinary in that it has remained unopened since, Prof Agre estimated, the 4th century BC.

• 古墓出现在色雷斯文明的鼎盛时期，这一点特别重要。”考古学家说，这座古墓属于公元前4世纪。