The British Archaeological Expedition to the ancient emporium of Vetren - Pistiros, central Bulgaria

Adjiyska Vodenitsa (Hadji's Water Mill), near Vetren, central Bulgaria, is a premier archaeological site of the European Iron Age. It was an inland emporium, acting as a centre of exchange between Continental regions of the East Balkans and the Mediterranean between 5th and 2nd centuries BCE. A granite inscription, found 2km north-east of the site, is one of the earliest documents from the chancery of a European prince, granting privileges to Greek merchants from named cities of the Aegean. It refers to Pistiros, an emporium, which has been identified with the site at Adjiyska Vodenitsa.