German politician and author, born at Breslau; while in the Prussian civil service he warmly sympathised with the French Revolution, but his zeal was greatly modified by perusal of Burke's "Reflections," a treatise he subsequently translated, and in 1802 entered the Austrian public service; in the capacity of a political writer he bitterly opposed Napoleon, but for other purposes his pen and support were at the service of the highest bidder; he was secretary at the Congress of Vienna, and held a similar post in many of the subsequent congresses (1764-1832).