Tetrobol

The Bisaltai were a Thracian tribe whose territory in the Strymon river valley sat directly astride the main overland route between Greece and the Aegean coast — a position that gave them outsized commercial importance relative to their political weight. Their coinage, struck in the decade before Philip I of Macedon absorbed the region, drew on the same rich silver deposits that would later underpin Macedonian expansion. This tetrobol belongs to a tribal coinage that effectively ended when Bisaltian independence did.