During the French Revolutionary Wars, the Austrians were driven from Italy by Napoleon, who set up republics throughout northern Italy, and by the Treaty of Campo Formio of 1797, Emperor Francis II relinquished any claims over the territories that made up the Kingdom of Italy. The imperial reorganization carried out in 1799–1803 left no room for Imperial claims to Italy – even the Archbishop of Cologne was gone, secularized along with the other ecclesiastical princes. In 1805, while the Holy Roman Empire was still in existence, Napoleon, by now Emperor Napoleon I, claimed the crown of the new Kingdom of Italy for himself, putting the Iron Crown on his head at Milan on 26 May 1805. The Empire itself was abolished the next year on 6 August 1806. The Congress of Vienna following Napoleon's defeat did not bring back the Holy Roman Empire nor the Kingdom of Italy.