Don Antonio II Boncompagni-Ludovisi, then Prince Boncompagni-Ludovisi, was the 8th Duke of Sora, Aquino, Arce and Arpino and 9th Marquess of Vignola and the Prince of Piombino, Marquis of Populonia, Prince of Venosa and Count of Conza, Lord di Scarlino, Populonia, Vignale, Abbadia del Fango, Suvereto, Buriano, Cerboli e Palmaiolan, and Lord prince of the Tuscan Archipelago including the islands of Elba, Montecristo, Pianosa, Gorgona, Capraia, and Isola del Giglio, from 1733 until he ceded the duchy in 1796 and was deposed in the principality on 21 March 1801 and in the marquessate during the Napoleonic Wars.