Archaeologists find Europe's most prehistoric town...
Archaeologists in Bulgaria believe they have discovered Europe's oldest prehistoric town, a settlement that was founded nearly 5,000 years before the birth of Christ.
Experts believe the key to the development of the town was salt, which at the time was as valuable as gold.
Remains of the ancient settlement, including the ruins of two-storey houses, fortification walls and parts of a gate, have been unearthed near the modern-day town of Provadia, close to the Black Sea resort of Varna.
It dates back to between 4,700 and 4,200BC – more than a millennium before the start of Greece's ancient civilisation.
Archaeologists found a site where salt was produced from nearby rock-salt deposits, some of the most extensive in southeast Europe.