The Thracians were able craftsmen. The gold and silverware they produced was exquisite – and is now a priced treasure in Bulgarian museums. They were also great winemakers. They drank their wine undiluted with water, thus gaining the disrespect of their next-door neighbours, the ancient Greeks. The biggest problem of the Thracians was they never developed or adopted an alphabet of their own. Their language remains a mystery, and lacking any written sources about them modern scientists continue to be confounded about their habits and everyday ways.