The Dresden Coinage Convention of 1838 was a multilateral treaty that attempted to bring some degree of standardisation to the currencies used in the Zollverein. The convention was agreed to at the General Mint Convention of the States of the Zollverein, held at Dresden. The conference had been prompted in part by the Munich Coin Treaty of 1837, by which the south German states adopted a unified currency. The Dresden treaty was concluded on 30 July 1838 and was ratified by the States of the Zollverein at a follow-up meeting on 7 January 1839. The contracting parties to the convention agreed to use either the Prussian thaler or the gulden; the treaty established permanently fixed exchange rates between the two currencies. The thaler was agreed to be equal to 1.75 gulden and thus the gulden