When free trade was established in Cologne by the French in 1797 , the success of Eau de Cologne prompted countless other businessmen to sell their own fragrances under the name of Eau de Cologne .
When free trade was established in Cologne by the French in 1797 , the success of Eau de Cologne prompted countless other businessmen to sell their own fragrances under the name of Eau de Cologne and even Farina .