The period 4600–4200 BC marks a fascinating chapter in prehistory when early civilizations across the globe were emerging and evolving in parallel. In Europe, the Varna culture of present-day Bulgaria astonished archaeologists with the world’s oldest processed gold treasure and evidence of the first social elites.

How the Sofia–Skopje railway and the Deve Bair tunnel went from 1910 optimism and 1940s concrete to a 2020s EU‑backed comeback.

Explore the Coțofeni Culture (c. 3500–2800 calBC): settlement shifts, pottery styles, mountain routes, and its role in the Final Copper Age to Early Bronze Age transition.

Discover the Ezero Culture (c. 3300–2700 calBC): fortified tell settlements in Thrace, early metallurgy, pottery styles, and links to Troy and wider Balkan networks.

The Achaemenid Persian Empire, founded by Cyrus the Great in the 6th century BC, was one of the ancient world’s largest and most powerful empires.