Facial reconstruction of a 2,400-year-old Thracian from Kaloyanowo, Bulgaria
Neolithic Bulgaria was inhabited by Europid populations with strong Cro-Magnoid traits, though cranial gracilization had already begun, likely due to the adoption of agriculture and dietary changes. By the Eneolithic, very gracile Mediterranean types appeared at sites like Russe.
At the end of the Eneolithic, brachycranial Europids emerged, including both gracile and more primitive forms. Some resembled the Oberkassel type, while others were similar to populations of the Gumelnitza, Boian, and German Bandkeramik cultures. Alongside Mediterranean types, Alpine and increasingly Dinaric traits appeared. From the Neolithic through the Bronze Age, Dinaricization intensified, which Balkan anthropologists considered largely autochthonous and possibly the result of mutation within Mediterranean populations.
The earliest Thracian skulls from Tarnawa showed Dinaric-Mediterranean traits. Later Thracian remains from Dolno Sachrane displayed Cro-Magnoid, gracile Mediterranean, and Dinaroid features. Additional Thracian skulls from the 5th century BC to 4th century AD included gracilized Mediterraneans and Dinaroids.
Overall, Ancient Thracians in Bulgaria were predominantly Mediterranean with some Dinaric admixture, closely resembling the earlier local pre-Thracian population. (Peter Boev, 1975)