In 1786, the last archbishop-elector of Trier, Clemens Wenceslaus of Saxony, greatly assisted the extension and improvement of the city, turning the Ehrenbreitstein into a magnificent baroque palace. After the fall of the Bastille in 1789, the city became, through the invitation of the archbishop-elector's chief minister, Ferdinand Freiherr von Duminique, one of the principal rendezvous points for French émigrés. The archbishop-elector approved of this because he was the uncle of the persecuted king of France, Louis XVI. Among the many royalist French refugees who flooded into the city were Louis XVI's two younger brothers, the Comte de Provence and the Comte d'Artois. In addition, Louis XVI's cousin, Prince Louis Joseph de Bourbon, prince de Condé, arrived and formed an army of young aristocrats willing to fight the French Revolution and restore the Ancien Régime. The "Army of Condé" joined with an allied army of Prussian and Austrian soldiers led by Duke Karl Wilhelm Ferdinand of Brunswick in an unsuccessful invasion of France in 1792. This drew down the wrath of the First French Republic on the archbishop-elector; in 1794, Coblenz was taken by the French Revolutionary army under Marceau (who was killed during the siege), and, after the signing of the Treaty of Lunéville (1801) it was made the capital of the new French départment of Rhin-et-Moselle. In 1814, it was occupied by the Russians. The Congress of Vienna assigned the city to Prussia, and in 1822, it was made the seat of government for the Prussian Rhine Province.