Leopold (1835–1905), the son of Karl Anton, was offered the Spanish crown after the Spanish Revolution of 1868 overthrew Queen Isabella II. He was supported by the Prussian Prime Minister Otto von Bismarck, but opposed by the French emperor Napoleon III. Leopold was forced to decline the offer, but the extra demands made by the French government and the sending of the Ems Telegram resulted in the Franco-Prussian War of 1870–71, which led to the fall of emperor Napoleon III and the setting up of the French Third Republic. Following the war and the death of Karl Anton, he ruled as prince of the Houses of Hohenzollern-Sigmaringen and Hohenzollern from 1885 until his death in 1905.