Found by chance during construction works in 1972 in the western industrial part of Varna the Varna Eneolithic Necropolis was under research excavations till 1991. Varna Necropolis is a burial site approximately half a kilometre from Lake Varna and 4 km from the city centre,  internationally considered one of the key archaeological sites in world prehistory. Studied are 294 graves of three types: graves with skeletons lying in a full straight position on the back, graves with bent skeletons turned to one of the sides and symbolic graves (cenotaphs). The oldest golden treasure in the world, dating to 5,000 BC, was discovered at the site. The artifacts can be seen at the Varna Archaeological Museum and at the National History Museum.