List of Titles granted during the French Empires. 1. First Empire under Napoleon I ( 18 May 1804 – 11 April 1814 ; 20 March – 22 June 1815). 2. Second Empire under Napoleon III (2 December 1852 – 4 September 1870).Reference: Armorial du Premier Empire, Vte A. Reverend, Editions Champion, Paris, 1974.