It was therefore decided to adopt a higher ratio than all these, viz. 13.5.[11] The history of the few years succeeding this measure is most instructive. The depreciation of monies continued, and on the 4th April 1652 a proclamation was issued, forbidding the currency of certain old monies of France, and again attempting to restrain the course of the exchanges; and three years later, 1655, under pretext that false moneyers were imitating the _louis d'or_ and the silver _écus_, the minting of _lis d'argent_ (lilies of gold and silver) was resolved upon. "But," says Le Blanc, "everybody knows that the true motive was the same as when a little later they resolved on the minting of 4-sol. pieces. Under the above pretext, the ratio basis of 1641 was broken. Remonstrances were vain until experience proved their weight, and the minting of the _lis d'or_ had to be discontinued. The pieces already minted received a value of 7 livres, and to correspond the _louis d'or_ was increased to 11 livres, by proclamation 15th March 1656." As silver was left untouched, the resulting alteration of the ratio was from 13-1/2 to 14-5/7. Florence. With the advance of Antwerp as the centre of European exchanges in the fifteenth century, the mercantile pre-eminence of Florence and Venice decayed, and their monetary history loses its former prime importance. But they by no means thereby lose their interest for us. Instead of profiting as of yore by every veer in the winds of exchanges, they are at the mercy of them, as was every other country outside the charmed circle of the Netherlands. The influence of the changed conditions in the production of the precious metals, due to the discovery of America, does not show itself in Florence before 1531, when (4th August) the price was by law advanced. Three years later, 5th March 1534, it was found that the state was receiving damage from the foreign monies circulating, and that the only native coin circulating was in a worn and depreciated state. A recoinage was accordingly ordered, circulation of all foreign monies of silver was forbidden, and all payments and contracts were commanded to be made in gold _scudi_ of the state. In order to inform the commercial element, the Mint masters were further ordered to make trial every fifteen days of the value of any foreign _scudi_, and to publish the result.