unesco site madara rider or madara horseman early medieval large rock relief carved on the madara pateau, northeastern bu

8th ancient antique archaeological archealogical art balkan bulgaria bulgarian bulgarians carved century classical cliff closeup complex cultural depiction dog early empire erosion heritage history horse horseman hunter khan large legend lion madara medieval monument mythology national nature nomadic northeastern old oldest pateau plateau proto relief rider rock sculpture shumen site symbol symbolism tourism travel triumphal unesco unique warrior