The "Basel Thaler" was a widely-used currency in Switzerland that was circulated between the 15th and 18th centuries. Although the currency is no longer in use, the term is still relevant today and has several synonyms, such as Basel Dollar, Basler Gulden, Basler Dukaten and Basler Louis d'or. These terms all refer to the same currency, which was minted in the Swiss city of Basel and was known for its high quality. The "Basel Thaler" played an important role in the growth of the Swiss economy and continues to be a significant piece of Swiss history.