Archaeologists in eastern Bulgaria say they have unearthed the oldest prehistoric town ever found in Europe, along with an ancient salt production site that gives a strong clue about why massive riches were discovered in the region.
Excavations at the site near the modern-day town of Provadia have so far uncovered the remains of a settlement of two-storey houses, a series of pits used for rituals as well as parts of a gate, bastion structures and three later fortification walls — all carbon dated between the middle and late Chalcolithic age from 4,700 to 4,200 BC.
Scientists uncover oldest known prehistoric ‘town’ near ancient salt mines
These people built this town with heavy rock before the discovery of the wheel. That had to be back breaking work without benefit of the wheel and they did this all because of salt. Which at that time salt was a very valuable commodity.