Austrian general, born at Vienna, of a noble family there; entered the army and distinguished himself in the wars against the Turks, the French Republic, and Napoleon; fought at Austerlitz and Wagram, negotiated the marriage of Napoleon with Maria Louisa, commanded the Austrian contingent sent to aid France in 1812, but joined the allies against Napoleon at Dresden and Leipzig, and captured Paris in 1814 at the head of the army of the Rhine (1771-1820).