During the War of Liberation, in a plea to assist the struggling economy and to finance the uprising against Napoleon, the Prussian royal family urged women to donate their gold jewelry to the State. In return, the donors were given replacement jewelry made of iron, often bearing the inscription Gold gab ich für Eisen ("I gave gold for iron"). Reaching its peak between 1813 and 1815, Berlin Ironworks jewelry became a fashionable expression of patriotism.